1 `acpi`: `<boolean>` ('default =' `1`)::
5 `agent`: `[enabled=]<1|0> [,fstrim_cloned_disks=<1|0>] [,type=<virtio|isa>]` ::
7 Enable/disable communication with the Qemu Guest Agent and its properties.
9 `enabled`=`<boolean>` ('default =' `0`);;
11 Enable/disable communication with a Qemu Guest Agent (QGA) running in the VM.
13 `fstrim_cloned_disks`=`<boolean>` ('default =' `0`);;
15 Run fstrim after moving a disk or migrating the VM.
17 `type`=`<isa | virtio>` ('default =' `virtio`);;
21 `arch`: `<aarch64 | x86_64>` ::
23 Virtual processor architecture. Defaults to the host.
27 Arbitrary arguments passed to kvm, for example:
29 args: -no-reboot -no-hpet
31 NOTE: this option is for experts only.
33 `audio0`: `device=<ich9-intel-hda|intel-hda|AC97> [,driver=<spice|none>]` ::
35 Configure a audio device, useful in combination with QXL/Spice.
37 `device`=`<AC97 | ich9-intel-hda | intel-hda>` ;;
39 Configure an audio device.
41 `driver`=`<none | spice>` ('default =' `spice`);;
43 Driver backend for the audio device.
45 `autostart`: `<boolean>` ('default =' `0`)::
47 Automatic restart after crash (currently ignored).
49 `balloon`: `<integer> (0 - N)` ::
51 Amount of target RAM for the VM in MB. Using zero disables the ballon driver.
53 `bios`: `<ovmf | seabios>` ('default =' `seabios`)::
55 Select BIOS implementation.
57 `boot`: `[[legacy=]<[acdn]{1,4}>] [,order=<device[;device...]>]` ::
59 Specify guest boot order. Use the 'order=' sub-property as usage with no key or 'legacy=' is deprecated.
61 `legacy`=`<[acdn]{1,4}>` ('default =' `cdn`);;
63 Boot on floppy (a), hard disk (c), CD-ROM (d), or network (n). Deprecated, use 'order=' instead.
65 `order`=`<device[;device...]>` ;;
67 The guest will attempt to boot from devices in the order they appear here.
69 Disks, optical drives and passed-through storage USB devices will be directly
70 booted from, NICs will load PXE, and PCIe devices will either behave like disks
71 (e.g. NVMe) or load an option ROM (e.g. RAID controller, hardware NIC).
73 Note that only devices in this list will be marked as bootable and thus loaded
74 by the guest firmware (BIOS/UEFI). If you require multiple disks for booting
75 (e.g. software-raid), you need to specify all of them here.
77 Overrides the deprecated 'legacy=[acdn]*' value when given.
79 `bootdisk`: `(ide|sata|scsi|virtio)\d+` ::
81 Enable booting from specified disk. Deprecated: Use 'boot: order=foo;bar' instead.
83 `cdrom`: `<volume>` ::
85 This is an alias for option -ide2
87 `cicustom`: `[meta=<volume>] [,network=<volume>] [,user=<volume>] [,vendor=<volume>]` ::
89 cloud-init: Specify custom files to replace the automatically generated ones at start.
93 Specify a custom file containing all meta data passed to the VM via"
94 ." cloud-init. This is provider specific meaning configdrive2 and nocloud differ.
96 `network`=`<volume>` ;;
98 Specify a custom file containing all network data passed to the VM via cloud-init.
102 Specify a custom file containing all user data passed to the VM via cloud-init.
104 `vendor`=`<volume>` ;;
106 Specify a custom file containing all vendor data passed to the VM via cloud-init.
108 `cipassword`: `<string>` ::
110 cloud-init: Password to assign the user. Using this is generally not recommended. Use ssh keys instead. Also note that older cloud-init versions do not support hashed passwords.
112 `citype`: `<configdrive2 | nocloud | opennebula>` ::
114 Specifies the cloud-init configuration format. The default depends on the configured operating system type (`ostype`. We use the `nocloud` format for Linux, and `configdrive2` for windows.
116 `ciuser`: `<string>` ::
118 cloud-init: User name to change ssh keys and password for instead of the image's configured default user.
120 `cores`: `<integer> (1 - N)` ('default =' `1`)::
122 The number of cores per socket.
124 `cpu`: `[[cputype=]<string>] [,flags=<+FLAG[;-FLAG...]>] [,hidden=<1|0>] [,hv-vendor-id=<vendor-id>] [,phys-bits=<8-64|host>] [,reported-model=<enum>]` ::
128 `cputype`=`<string>` ('default =' `kvm64`);;
130 Emulated CPU type. Can be default or custom name (custom model names must be prefixed with 'custom-').
132 `flags`=`<+FLAG[;-FLAG...]>` ;;
134 List of additional CPU flags separated by ';'. Use '+FLAG' to enable, '-FLAG' to disable a flag. Custom CPU models can specify any flag supported by QEMU/KVM, VM-specific flags must be from the following set for security reasons: pcid, spec-ctrl, ibpb, ssbd, virt-ssbd, amd-ssbd, amd-no-ssb, pdpe1gb, md-clear, hv-tlbflush, hv-evmcs, aes
136 `hidden`=`<boolean>` ('default =' `0`);;
138 Do not identify as a KVM virtual machine.
140 `hv-vendor-id`=`<vendor-id>` ;;
142 The Hyper-V vendor ID. Some drivers or programs inside Windows guests need a specific ID.
144 `phys-bits`=`<8-64|host>` ;;
146 The physical memory address bits that are reported to the guest OS. Should be smaller or equal to the host's. Set to 'host' to use value from host CPU, but note that doing so will break live migration to CPUs with other values.
148 `reported-model`=`<486 | Broadwell | Broadwell-IBRS | Broadwell-noTSX | Broadwell-noTSX-IBRS | Cascadelake-Server | Cascadelake-Server-noTSX | Conroe | EPYC | EPYC-IBPB | EPYC-Rome | Haswell | Haswell-IBRS | Haswell-noTSX | Haswell-noTSX-IBRS | Icelake-Client | Icelake-Client-noTSX | Icelake-Server | Icelake-Server-noTSX | IvyBridge | IvyBridge-IBRS | KnightsMill | Nehalem | Nehalem-IBRS | Opteron_G1 | Opteron_G2 | Opteron_G3 | Opteron_G4 | Opteron_G5 | Penryn | SandyBridge | SandyBridge-IBRS | Skylake-Client | Skylake-Client-IBRS | Skylake-Client-noTSX-IBRS | Skylake-Server | Skylake-Server-IBRS | Skylake-Server-noTSX-IBRS | Westmere | Westmere-IBRS | athlon | core2duo | coreduo | host | kvm32 | kvm64 | max | pentium | pentium2 | pentium3 | phenom | qemu32 | qemu64>` ('default =' `kvm64`);;
150 CPU model and vendor to report to the guest. Must be a QEMU/KVM supported model. Only valid for custom CPU model definitions, default models will always report themselves to the guest OS.
152 `cpulimit`: `<number> (0 - 128)` ('default =' `0`)::
156 NOTE: If the computer has 2 CPUs, it has total of '2' CPU time. Value '0' indicates no CPU limit.
158 `affinity`: `<string>`::
160 Set of CPU cores to pin the virtual machine processes to. This is a comma sepparated list of numbers or ranges in list format as defined by the Linux man page for cpuset. ( e.g `0,4-6,9` )
162 `cpuunits`: `<integer> (1 - 262144)` ('default =' `cgroup v1: 1024, cgroup v2: 100`)::
164 CPU weight for a VM. Argument is used in the kernel fair scheduler. The larger the number is, the more CPU time this VM gets. Number is relative to weights of all the other running VMs.
166 `description`: `<string>` ::
168 Description for the VM. Shown in the web-interface VM's summary. This is saved as comment inside the configuration file.
170 `efidisk0`: `[file=]<volume> [,efitype=<2m|4m>] [,format=<enum>] [,pre-enrolled-keys=<1|0>] [,size=<DiskSize>]` ::
172 Configure a Disk for storing EFI vars.
174 `efitype`=`<2m | 4m>` ('default =' `2m`);;
176 Size and type of the OVMF EFI vars. '4m' is newer and recommended, and required for Secure Boot. For backwards compatibility, '2m' is used if not otherwise specified.
180 The drive's backing volume.
182 `format`=`<cloop | cow | qcow | qcow2 | qed | raw | vmdk>` ;;
184 The drive's backing file's data format.
186 `pre-enrolled-keys`=`<boolean>` ('default =' `0`);;
188 Use am EFI vars template with distribution-specific and Microsoft Standard keys enrolled, if used with 'efitype=4m'. Note that this will enable Secure Boot by default, though it can still be turned off from within the VM.
190 `size`=`<DiskSize>` ;;
192 Disk size. This is purely informational and has no effect.
194 `freeze`: `<boolean>` ::
196 Freeze CPU at startup (use 'c' monitor command to start execution).
198 `hookscript`: `<string>` ::
200 Script that will be executed during various steps in the vms lifetime.
202 `hostpci[n]`: `[host=]<HOSTPCIID[;HOSTPCIID2...]> [,device-id=<hex id>] [,legacy-igd=<1|0>] [,mdev=<string>] [,pcie=<1|0>] [,rombar=<1|0>] [,romfile=<string>] [,sub-device-id=<hex id>] [,sub-vendor-id=<hex id>] [,vendor-id=<hex id>] [,x-vga=<1|0>]` ::
204 Map host PCI devices into guest.
206 NOTE: This option allows direct access to host hardware. So it is no longer
207 possible to migrate such machines - use with special care.
209 CAUTION: Experimental! User reported problems with this option.
211 `device-id`=`<hex id>` ;;
213 Override PCI device ID visible to guest
215 `host`=`<HOSTPCIID[;HOSTPCIID2...]>` ;;
217 Host PCI device pass through. The PCI ID of a host's PCI device or a list
218 of PCI virtual functions of the host. HOSTPCIID syntax is:
220 'bus:dev.func' (hexadecimal numbers)
222 You can us the 'lspci' command to list existing PCI devices.
224 `legacy-igd`=`<boolean>` ('default =' `0`);;
226 Pass this device in legacy IGD mode, making it the primary and exclusive graphics device in the VM. Requires 'pc-i440fx' machine type and VGA set to 'none'.
230 The type of mediated device to use.
231 An instance of this type will be created on startup of the VM and
232 will be cleaned up when the VM stops.
234 `pcie`=`<boolean>` ('default =' `0`);;
236 Choose the PCI-express bus (needs the 'q35' machine model).
238 `rombar`=`<boolean>` ('default =' `1`);;
240 Specify whether or not the device's ROM will be visible in the guest's memory map.
242 `romfile`=`<string>` ;;
244 Custom pci device rom filename (must be located in /usr/share/kvm/).
246 `sub-device-id`=`<hex id>` ;;
248 Override PCI subsystem device ID visible to guest
250 `sub-vendor-id`=`<hex id>` ;;
252 Override PCI subsystem vendor ID visible to guest
254 `vendor-id`=`<hex id>` ;;
256 Override PCI vendor ID visible to guest
258 `x-vga`=`<boolean>` ('default =' `0`);;
260 Enable vfio-vga device support.
262 `hotplug`: `<string>` ('default =' `network,disk,usb`)::
264 Selectively enable hotplug features. This is a comma separated list of hotplug features: 'network', 'disk', 'cpu', 'memory' and 'usb'. Use '0' to disable hotplug completely. Using '1' as value is an alias for the default `network,disk,usb`.
266 `hugepages`: `<1024 | 2 | any>` ::
268 Enable/disable hugepages memory.
270 `ide[n]`: `[file=]<volume> [,aio=<native|threads|io_uring>] [,backup=<1|0>] [,bps=<bps>] [,bps_max_length=<seconds>] [,bps_rd=<bps>] [,bps_rd_max_length=<seconds>] [,bps_wr=<bps>] [,bps_wr_max_length=<seconds>] [,cache=<enum>] [,cyls=<integer>] [,detect_zeroes=<1|0>] [,discard=<ignore|on>] [,format=<enum>] [,heads=<integer>] [,iops=<iops>] [,iops_max=<iops>] [,iops_max_length=<seconds>] [,iops_rd=<iops>] [,iops_rd_max=<iops>] [,iops_rd_max_length=<seconds>] [,iops_wr=<iops>] [,iops_wr_max=<iops>] [,iops_wr_max_length=<seconds>] [,mbps=<mbps>] [,mbps_max=<mbps>] [,mbps_rd=<mbps>] [,mbps_rd_max=<mbps>] [,mbps_wr=<mbps>] [,mbps_wr_max=<mbps>] [,media=<cdrom|disk>] [,model=<model>] [,replicate=<1|0>] [,rerror=<ignore|report|stop>] [,secs=<integer>] [,serial=<serial>] [,shared=<1|0>] [,size=<DiskSize>] [,snapshot=<1|0>] [,ssd=<1|0>] [,trans=<none|lba|auto>] [,werror=<enum>] [,wwn=<wwn>]` ::
272 Use volume as IDE hard disk or CD-ROM (n is 0 to 3).
274 `aio`=`<io_uring | native | threads>` ;;
278 `backup`=`<boolean>` ;;
280 Whether the drive should be included when making backups.
284 Maximum r/w speed in bytes per second.
286 `bps_max_length`=`<seconds>` ;;
288 Maximum length of I/O bursts in seconds.
292 Maximum read speed in bytes per second.
294 `bps_rd_max_length`=`<seconds>` ;;
296 Maximum length of read I/O bursts in seconds.
300 Maximum write speed in bytes per second.
302 `bps_wr_max_length`=`<seconds>` ;;
304 Maximum length of write I/O bursts in seconds.
306 `cache`=`<directsync | none | unsafe | writeback | writethrough>` ;;
308 The drive's cache mode
310 `cyls`=`<integer>` ;;
312 Force the drive's physical geometry to have a specific cylinder count.
314 `detect_zeroes`=`<boolean>` ;;
316 Controls whether to detect and try to optimize writes of zeroes.
318 `discard`=`<ignore | on>` ;;
320 Controls whether to pass discard/trim requests to the underlying storage.
324 The drive's backing volume.
326 `format`=`<cloop | cow | qcow | qcow2 | qed | raw | vmdk>` ;;
328 The drive's backing file's data format.
330 `heads`=`<integer>` ;;
332 Force the drive's physical geometry to have a specific head count.
336 Maximum r/w I/O in operations per second.
338 `iops_max`=`<iops>` ;;
340 Maximum unthrottled r/w I/O pool in operations per second.
342 `iops_max_length`=`<seconds>` ;;
344 Maximum length of I/O bursts in seconds.
346 `iops_rd`=`<iops>` ;;
348 Maximum read I/O in operations per second.
350 `iops_rd_max`=`<iops>` ;;
352 Maximum unthrottled read I/O pool in operations per second.
354 `iops_rd_max_length`=`<seconds>` ;;
356 Maximum length of read I/O bursts in seconds.
358 `iops_wr`=`<iops>` ;;
360 Maximum write I/O in operations per second.
362 `iops_wr_max`=`<iops>` ;;
364 Maximum unthrottled write I/O pool in operations per second.
366 `iops_wr_max_length`=`<seconds>` ;;
368 Maximum length of write I/O bursts in seconds.
372 Maximum r/w speed in megabytes per second.
374 `mbps_max`=`<mbps>` ;;
376 Maximum unthrottled r/w pool in megabytes per second.
378 `mbps_rd`=`<mbps>` ;;
380 Maximum read speed in megabytes per second.
382 `mbps_rd_max`=`<mbps>` ;;
384 Maximum unthrottled read pool in megabytes per second.
386 `mbps_wr`=`<mbps>` ;;
388 Maximum write speed in megabytes per second.
390 `mbps_wr_max`=`<mbps>` ;;
392 Maximum unthrottled write pool in megabytes per second.
394 `media`=`<cdrom | disk>` ('default =' `disk`);;
396 The drive's media type.
400 The drive's reported model name, url-encoded, up to 40 bytes long.
402 `replicate`=`<boolean>` ('default =' `1`);;
404 Whether the drive should considered for replication jobs.
406 `rerror`=`<ignore | report | stop>` ;;
410 `secs`=`<integer>` ;;
412 Force the drive's physical geometry to have a specific sector count.
414 `serial`=`<serial>` ;;
416 The drive's reported serial number, url-encoded, up to 20 bytes long.
418 `shared`=`<boolean>` ('default =' `0`);;
420 Mark this locally-managed volume as available on all nodes.
422 WARNING: This option does not share the volume automatically, it assumes it is shared already!
424 `size`=`<DiskSize>` ;;
426 Disk size. This is purely informational and has no effect.
428 `snapshot`=`<boolean>` ;;
430 Controls qemu's snapshot mode feature. If activated, changes made to the disk are temporary and will be discarded when the VM is shutdown.
434 Whether to expose this drive as an SSD, rather than a rotational hard disk.
436 `trans`=`<auto | lba | none>` ;;
438 Force disk geometry bios translation mode.
440 `werror`=`<enospc | ignore | report | stop>` ;;
446 The drive's worldwide name, encoded as 16 bytes hex string, prefixed by '0x'.
448 `ipconfig[n]`: `[gw=<GatewayIPv4>] [,gw6=<GatewayIPv6>] [,ip=<IPv4Format/CIDR>] [,ip6=<IPv6Format/CIDR>]` ::
450 cloud-init: Specify IP addresses and gateways for the corresponding interface.
452 IP addresses use CIDR notation, gateways are optional but need an IP of the same type specified.
454 The special string 'dhcp' can be used for IP addresses to use DHCP, in which case no explicit
455 gateway should be provided.
456 For IPv6 the special string 'auto' can be used to use stateless autoconfiguration. This requires
457 cloud-init 19.4 or newer.
459 If cloud-init is enabled and neither an IPv4 nor an IPv6 address is specified, it defaults to using
462 `gw`=`<GatewayIPv4>` ;;
464 Default gateway for IPv4 traffic.
466 NOTE: Requires option(s): `ip`
468 `gw6`=`<GatewayIPv6>` ;;
470 Default gateway for IPv6 traffic.
472 NOTE: Requires option(s): `ip6`
474 `ip`=`<IPv4Format/CIDR>` ('default =' `dhcp`);;
476 IPv4 address in CIDR format.
478 `ip6`=`<IPv6Format/CIDR>` ('default =' `dhcp`);;
480 IPv6 address in CIDR format.
482 `ivshmem`: `size=<integer> [,name=<string>]` ::
484 Inter-VM shared memory. Useful for direct communication between VMs, or to the host.
488 The name of the file. Will be prefixed with 'pve-shm-'. Default is the VMID. Will be deleted when the VM is stopped.
490 `size`=`<integer> (1 - N)` ;;
492 The size of the file in MB.
494 `keephugepages`: `<boolean>` ('default =' `0`)::
496 Use together with hugepages. If enabled, hugepages will not not be deleted after VM shutdown and can be used for subsequent starts.
498 `keyboard`: `<da | de | de-ch | en-gb | en-us | es | fi | fr | fr-be | fr-ca | fr-ch | hu | is | it | ja | lt | mk | nl | no | pl | pt | pt-br | sl | sv | tr>` ::
500 Keyboard layout for VNC server. This option is generally not required and is often better handled from within the guest OS.
502 `kvm`: `<boolean>` ('default =' `1`)::
504 Enable/disable KVM hardware virtualization.
506 `localtime`: `<boolean>` ::
508 Set the real time clock (RTC) to local time. This is enabled by default if the `ostype` indicates a Microsoft Windows OS.
510 `lock`: `<backup | clone | create | migrate | rollback | snapshot | snapshot-delete | suspended | suspending>` ::
514 `machine`: `(pc|pc(-i440fx)?-\d+(\.\d+)+(\+pve\d+)?(\.pxe)?|q35|pc-q35-\d+(\.\d+)+(\+pve\d+)?(\.pxe)?|virt(?:-\d+(\.\d+)+)?(\+pve\d+)?)` ::
516 Specifies the Qemu machine type.
518 `memory`: `<integer> (16 - N)` ('default =' `512`)::
520 Amount of RAM for the VM in MB. This is the maximum available memory when you use the balloon device.
522 `migrate_downtime`: `<number> (0 - N)` ('default =' `0.1`)::
524 Set maximum tolerated downtime (in seconds) for migrations.
526 `migrate_speed`: `<integer> (0 - N)` ('default =' `0`)::
528 Set maximum speed (in MB/s) for migrations. Value 0 is no limit.
530 `name`: `<string>` ::
532 Set a name for the VM. Only used on the configuration web interface.
534 `nameserver`: `<string>` ::
536 cloud-init: Sets DNS server IP address for a container. Create will'
537 .' automatically use the setting from the host if neither searchdomain nor nameserver'
540 `net[n]`: `[model=]<enum> [,bridge=<bridge>] [,firewall=<1|0>] [,link_down=<1|0>] [,macaddr=<XX:XX:XX:XX:XX:XX>] [,mtu=<integer>] [,queues=<integer>] [,rate=<number>] [,tag=<integer>] [,trunks=<vlanid[;vlanid...]>] [,<model>=<macaddr>]` ::
542 Specify network devices.
544 `bridge`=`<bridge>` ;;
546 Bridge to attach the network device to. The Proxmox VE standard bridge
549 If you do not specify a bridge, we create a kvm user (NATed) network
550 device, which provides DHCP and DNS services. The following addresses
557 The DHCP server assign addresses to the guest starting from 10.0.2.15.
559 `firewall`=`<boolean>` ;;
561 Whether this interface should be protected by the firewall.
563 `link_down`=`<boolean>` ;;
565 Whether this interface should be disconnected (like pulling the plug).
567 `macaddr`=`<XX:XX:XX:XX:XX:XX>` ;;
569 A common MAC address with the I/G (Individual/Group) bit not set.
571 `model`=`<e1000 | e1000-82540em | e1000-82544gc | e1000-82545em | e1000e | i82551 | i82557b | i82559er | ne2k_isa | ne2k_pci | pcnet | rtl8139 | virtio | vmxnet3>` ;;
573 Network Card Model. The 'virtio' model provides the best performance with very low CPU overhead. If your guest does not support this driver, it is usually best to use 'e1000'.
575 `mtu`=`<integer> (1 - 65520)` ;;
577 Force MTU, for VirtIO only. Set to '1' to use the bridge MTU
579 `queues`=`<integer> (0 - 16)` ;;
581 Number of packet queues to be used on the device.
583 `rate`=`<number> (0 - N)` ;;
585 Rate limit in mbps (megabytes per second) as floating point number.
587 `tag`=`<integer> (1 - 4094)` ;;
589 VLAN tag to apply to packets on this interface.
591 `trunks`=`<vlanid[;vlanid...]>` ;;
593 VLAN trunks to pass through this interface.
595 `numa`: `<boolean>` ('default =' `0`)::
599 `numa[n]`: `cpus=<id[-id];...> [,hostnodes=<id[-id];...>] [,memory=<number>] [,policy=<preferred|bind|interleave>]` ::
603 `cpus`=`<id[-id];...>` ;;
605 CPUs accessing this NUMA node.
607 `hostnodes`=`<id[-id];...>` ;;
609 Host NUMA nodes to use.
611 `memory`=`<number>` ;;
613 Amount of memory this NUMA node provides.
615 `policy`=`<bind | interleave | preferred>` ;;
617 NUMA allocation policy.
619 `onboot`: `<boolean>` ('default =' `0`)::
621 Specifies whether a VM will be started during system bootup.
623 `ostype`: `<l24 | l26 | other | solaris | w2k | w2k3 | w2k8 | win10 | win11 | win7 | win8 | wvista | wxp>` ::
625 Specify guest operating system. This is used to enable special
626 optimization/features for specific operating systems:
629 other;; unspecified OS
630 wxp;; Microsoft Windows XP
631 w2k;; Microsoft Windows 2000
632 w2k3;; Microsoft Windows 2003
633 w2k8;; Microsoft Windows 2008
634 wvista;; Microsoft Windows Vista
635 win7;; Microsoft Windows 7
636 win8;; Microsoft Windows 8/2012/2012r2
637 win10;; Microsoft Windows 10/2016/2019
638 win11;; Microsoft Windows 11/2022
639 l24;; Linux 2.4 Kernel
640 l26;; Linux 2.6 - 5.X Kernel
641 solaris;; Solaris/OpenSolaris/OpenIndiania kernel
643 `parallel[n]`: `/dev/parport\d+|/dev/usb/lp\d+` ::
645 Map host parallel devices (n is 0 to 2).
647 NOTE: This option allows direct access to host hardware. So it is no longer possible to migrate such
648 machines - use with special care.
650 CAUTION: Experimental! User reported problems with this option.
652 `protection`: `<boolean>` ('default =' `0`)::
654 Sets the protection flag of the VM. This will disable the remove VM and remove disk operations.
656 `reboot`: `<boolean>` ('default =' `1`)::
658 Allow reboot. If set to '0' the VM exit on reboot.
660 `rng0`: `[source=]</dev/urandom|/dev/random|/dev/hwrng> [,max_bytes=<integer>] [,period=<integer>]` ::
662 Configure a VirtIO-based Random Number Generator.
664 `max_bytes`=`<integer>` ('default =' `1024`);;
666 Maximum bytes of entropy allowed to get injected into the guest every 'period' milliseconds. Prefer a lower value when using '/dev/random' as source. Use `0` to disable limiting (potentially dangerous!).
668 `period`=`<integer>` ('default =' `1000`);;
670 Every 'period' milliseconds the entropy-injection quota is reset, allowing the guest to retrieve another 'max_bytes' of entropy.
672 `source`=`</dev/hwrng | /dev/random | /dev/urandom>` ;;
674 The file on the host to gather entropy from. In most cases '/dev/urandom' should be preferred over '/dev/random' to avoid entropy-starvation issues on the host. Using urandom does *not* decrease security in any meaningful way, as it's still seeded from real entropy, and the bytes provided will most likely be mixed with real entropy on the guest as well. '/dev/hwrng' can be used to pass through a hardware RNG from the host.
676 `sata[n]`: `[file=]<volume> [,aio=<native|threads|io_uring>] [,backup=<1|0>] [,bps=<bps>] [,bps_max_length=<seconds>] [,bps_rd=<bps>] [,bps_rd_max_length=<seconds>] [,bps_wr=<bps>] [,bps_wr_max_length=<seconds>] [,cache=<enum>] [,cyls=<integer>] [,detect_zeroes=<1|0>] [,discard=<ignore|on>] [,format=<enum>] [,heads=<integer>] [,iops=<iops>] [,iops_max=<iops>] [,iops_max_length=<seconds>] [,iops_rd=<iops>] [,iops_rd_max=<iops>] [,iops_rd_max_length=<seconds>] [,iops_wr=<iops>] [,iops_wr_max=<iops>] [,iops_wr_max_length=<seconds>] [,mbps=<mbps>] [,mbps_max=<mbps>] [,mbps_rd=<mbps>] [,mbps_rd_max=<mbps>] [,mbps_wr=<mbps>] [,mbps_wr_max=<mbps>] [,media=<cdrom|disk>] [,replicate=<1|0>] [,rerror=<ignore|report|stop>] [,secs=<integer>] [,serial=<serial>] [,shared=<1|0>] [,size=<DiskSize>] [,snapshot=<1|0>] [,ssd=<1|0>] [,trans=<none|lba|auto>] [,werror=<enum>] [,wwn=<wwn>]` ::
678 Use volume as SATA hard disk or CD-ROM (n is 0 to 5).
680 `aio`=`<io_uring | native | threads>` ;;
684 `backup`=`<boolean>` ;;
686 Whether the drive should be included when making backups.
690 Maximum r/w speed in bytes per second.
692 `bps_max_length`=`<seconds>` ;;
694 Maximum length of I/O bursts in seconds.
698 Maximum read speed in bytes per second.
700 `bps_rd_max_length`=`<seconds>` ;;
702 Maximum length of read I/O bursts in seconds.
706 Maximum write speed in bytes per second.
708 `bps_wr_max_length`=`<seconds>` ;;
710 Maximum length of write I/O bursts in seconds.
712 `cache`=`<directsync | none | unsafe | writeback | writethrough>` ;;
714 The drive's cache mode
716 `cyls`=`<integer>` ;;
718 Force the drive's physical geometry to have a specific cylinder count.
720 `detect_zeroes`=`<boolean>` ;;
722 Controls whether to detect and try to optimize writes of zeroes.
724 `discard`=`<ignore | on>` ;;
726 Controls whether to pass discard/trim requests to the underlying storage.
730 The drive's backing volume.
732 `format`=`<cloop | cow | qcow | qcow2 | qed | raw | vmdk>` ;;
734 The drive's backing file's data format.
736 `heads`=`<integer>` ;;
738 Force the drive's physical geometry to have a specific head count.
742 Maximum r/w I/O in operations per second.
744 `iops_max`=`<iops>` ;;
746 Maximum unthrottled r/w I/O pool in operations per second.
748 `iops_max_length`=`<seconds>` ;;
750 Maximum length of I/O bursts in seconds.
752 `iops_rd`=`<iops>` ;;
754 Maximum read I/O in operations per second.
756 `iops_rd_max`=`<iops>` ;;
758 Maximum unthrottled read I/O pool in operations per second.
760 `iops_rd_max_length`=`<seconds>` ;;
762 Maximum length of read I/O bursts in seconds.
764 `iops_wr`=`<iops>` ;;
766 Maximum write I/O in operations per second.
768 `iops_wr_max`=`<iops>` ;;
770 Maximum unthrottled write I/O pool in operations per second.
772 `iops_wr_max_length`=`<seconds>` ;;
774 Maximum length of write I/O bursts in seconds.
778 Maximum r/w speed in megabytes per second.
780 `mbps_max`=`<mbps>` ;;
782 Maximum unthrottled r/w pool in megabytes per second.
784 `mbps_rd`=`<mbps>` ;;
786 Maximum read speed in megabytes per second.
788 `mbps_rd_max`=`<mbps>` ;;
790 Maximum unthrottled read pool in megabytes per second.
792 `mbps_wr`=`<mbps>` ;;
794 Maximum write speed in megabytes per second.
796 `mbps_wr_max`=`<mbps>` ;;
798 Maximum unthrottled write pool in megabytes per second.
800 `media`=`<cdrom | disk>` ('default =' `disk`);;
802 The drive's media type.
804 `replicate`=`<boolean>` ('default =' `1`);;
806 Whether the drive should considered for replication jobs.
808 `rerror`=`<ignore | report | stop>` ;;
812 `secs`=`<integer>` ;;
814 Force the drive's physical geometry to have a specific sector count.
816 `serial`=`<serial>` ;;
818 The drive's reported serial number, url-encoded, up to 20 bytes long.
820 `shared`=`<boolean>` ('default =' `0`);;
822 Mark this locally-managed volume as available on all nodes.
824 WARNING: This option does not share the volume automatically, it assumes it is shared already!
826 `size`=`<DiskSize>` ;;
828 Disk size. This is purely informational and has no effect.
830 `snapshot`=`<boolean>` ;;
832 Controls qemu's snapshot mode feature. If activated, changes made to the disk are temporary and will be discarded when the VM is shutdown.
836 Whether to expose this drive as an SSD, rather than a rotational hard disk.
838 `trans`=`<auto | lba | none>` ;;
840 Force disk geometry bios translation mode.
842 `werror`=`<enospc | ignore | report | stop>` ;;
848 The drive's worldwide name, encoded as 16 bytes hex string, prefixed by '0x'.
850 `scsi[n]`: `[file=]<volume> [,aio=<native|threads|io_uring>] [,backup=<1|0>] [,bps=<bps>] [,bps_max_length=<seconds>] [,bps_rd=<bps>] [,bps_rd_max_length=<seconds>] [,bps_wr=<bps>] [,bps_wr_max_length=<seconds>] [,cache=<enum>] [,cyls=<integer>] [,detect_zeroes=<1|0>] [,discard=<ignore|on>] [,format=<enum>] [,heads=<integer>] [,iops=<iops>] [,iops_max=<iops>] [,iops_max_length=<seconds>] [,iops_rd=<iops>] [,iops_rd_max=<iops>] [,iops_rd_max_length=<seconds>] [,iops_wr=<iops>] [,iops_wr_max=<iops>] [,iops_wr_max_length=<seconds>] [,iothread=<1|0>] [,mbps=<mbps>] [,mbps_max=<mbps>] [,mbps_rd=<mbps>] [,mbps_rd_max=<mbps>] [,mbps_wr=<mbps>] [,mbps_wr_max=<mbps>] [,media=<cdrom|disk>] [,queues=<integer>] [,replicate=<1|0>] [,rerror=<ignore|report|stop>] [,ro=<1|0>] [,scsiblock=<1|0>] [,secs=<integer>] [,serial=<serial>] [,shared=<1|0>] [,size=<DiskSize>] [,snapshot=<1|0>] [,ssd=<1|0>] [,trans=<none|lba|auto>] [,werror=<enum>] [,wwn=<wwn>]` ::
852 Use volume as SCSI hard disk or CD-ROM (n is 0 to 30).
854 `aio`=`<io_uring | native | threads>` ;;
858 `backup`=`<boolean>` ;;
860 Whether the drive should be included when making backups.
864 Maximum r/w speed in bytes per second.
866 `bps_max_length`=`<seconds>` ;;
868 Maximum length of I/O bursts in seconds.
872 Maximum read speed in bytes per second.
874 `bps_rd_max_length`=`<seconds>` ;;
876 Maximum length of read I/O bursts in seconds.
880 Maximum write speed in bytes per second.
882 `bps_wr_max_length`=`<seconds>` ;;
884 Maximum length of write I/O bursts in seconds.
886 `cache`=`<directsync | none | unsafe | writeback | writethrough>` ;;
888 The drive's cache mode
890 `cyls`=`<integer>` ;;
892 Force the drive's physical geometry to have a specific cylinder count.
894 `detect_zeroes`=`<boolean>` ;;
896 Controls whether to detect and try to optimize writes of zeroes.
898 `discard`=`<ignore | on>` ;;
900 Controls whether to pass discard/trim requests to the underlying storage.
904 The drive's backing volume.
906 `format`=`<cloop | cow | qcow | qcow2 | qed | raw | vmdk>` ;;
908 The drive's backing file's data format.
910 `heads`=`<integer>` ;;
912 Force the drive's physical geometry to have a specific head count.
916 Maximum r/w I/O in operations per second.
918 `iops_max`=`<iops>` ;;
920 Maximum unthrottled r/w I/O pool in operations per second.
922 `iops_max_length`=`<seconds>` ;;
924 Maximum length of I/O bursts in seconds.
926 `iops_rd`=`<iops>` ;;
928 Maximum read I/O in operations per second.
930 `iops_rd_max`=`<iops>` ;;
932 Maximum unthrottled read I/O pool in operations per second.
934 `iops_rd_max_length`=`<seconds>` ;;
936 Maximum length of read I/O bursts in seconds.
938 `iops_wr`=`<iops>` ;;
940 Maximum write I/O in operations per second.
942 `iops_wr_max`=`<iops>` ;;
944 Maximum unthrottled write I/O pool in operations per second.
946 `iops_wr_max_length`=`<seconds>` ;;
948 Maximum length of write I/O bursts in seconds.
950 `iothread`=`<boolean>` ;;
952 Whether to use iothreads for this drive
956 Maximum r/w speed in megabytes per second.
958 `mbps_max`=`<mbps>` ;;
960 Maximum unthrottled r/w pool in megabytes per second.
962 `mbps_rd`=`<mbps>` ;;
964 Maximum read speed in megabytes per second.
966 `mbps_rd_max`=`<mbps>` ;;
968 Maximum unthrottled read pool in megabytes per second.
970 `mbps_wr`=`<mbps>` ;;
972 Maximum write speed in megabytes per second.
974 `mbps_wr_max`=`<mbps>` ;;
976 Maximum unthrottled write pool in megabytes per second.
978 `media`=`<cdrom | disk>` ('default =' `disk`);;
980 The drive's media type.
982 `queues`=`<integer> (2 - N)` ;;
986 `replicate`=`<boolean>` ('default =' `1`);;
988 Whether the drive should considered for replication jobs.
990 `rerror`=`<ignore | report | stop>` ;;
996 Whether the drive is read-only.
998 `scsiblock`=`<boolean>` ('default =' `0`);;
1000 whether to use scsi-block for full passthrough of host block device
1002 WARNING: can lead to I/O errors in combination with low memory or high memory fragmentation on host
1004 `secs`=`<integer>` ;;
1006 Force the drive's physical geometry to have a specific sector count.
1008 `serial`=`<serial>` ;;
1010 The drive's reported serial number, url-encoded, up to 20 bytes long.
1012 `shared`=`<boolean>` ('default =' `0`);;
1014 Mark this locally-managed volume as available on all nodes.
1016 WARNING: This option does not share the volume automatically, it assumes it is shared already!
1018 `size`=`<DiskSize>` ;;
1020 Disk size. This is purely informational and has no effect.
1022 `snapshot`=`<boolean>` ;;
1024 Controls qemu's snapshot mode feature. If activated, changes made to the disk are temporary and will be discarded when the VM is shutdown.
1026 `ssd`=`<boolean>` ;;
1028 Whether to expose this drive as an SSD, rather than a rotational hard disk.
1030 `trans`=`<auto | lba | none>` ;;
1032 Force disk geometry bios translation mode.
1034 `werror`=`<enospc | ignore | report | stop>` ;;
1040 The drive's worldwide name, encoded as 16 bytes hex string, prefixed by '0x'.
1042 `scsihw`: `<lsi | lsi53c810 | megasas | pvscsi | virtio-scsi-pci | virtio-scsi-single>` ('default =' `lsi`)::
1044 SCSI controller model
1046 `searchdomain`: `<string>` ::
1048 cloud-init: Sets DNS search domains for a container. Create will'
1049 .' automatically use the setting from the host if neither searchdomain nor nameserver'
1052 `serial[n]`: `(/dev/.+|socket)` ::
1054 Create a serial device inside the VM (n is 0 to 3), and pass through a
1055 host serial device (i.e. /dev/ttyS0), or create a unix socket on the
1056 host side (use 'qm terminal' to open a terminal connection).
1058 NOTE: If you pass through a host serial device, it is no longer possible to migrate such machines -
1059 use with special care.
1061 CAUTION: Experimental! User reported problems with this option.
1063 `shares`: `<integer> (0 - 50000)` ('default =' `1000`)::
1065 Amount of memory shares for auto-ballooning. The larger the number is, the more memory this VM gets. Number is relative to weights of all other running VMs. Using zero disables auto-ballooning. Auto-ballooning is done by pvestatd.
1067 `smbios1`: `[base64=<1|0>] [,family=<Base64 encoded string>] [,manufacturer=<Base64 encoded string>] [,product=<Base64 encoded string>] [,serial=<Base64 encoded string>] [,sku=<Base64 encoded string>] [,uuid=<UUID>] [,version=<Base64 encoded string>]` ::
1069 Specify SMBIOS type 1 fields.
1071 `base64`=`<boolean>` ;;
1073 Flag to indicate that the SMBIOS values are base64 encoded
1075 `family`=`<Base64 encoded string>` ;;
1077 Set SMBIOS1 family string.
1079 `manufacturer`=`<Base64 encoded string>` ;;
1081 Set SMBIOS1 manufacturer.
1083 `product`=`<Base64 encoded string>` ;;
1085 Set SMBIOS1 product ID.
1087 `serial`=`<Base64 encoded string>` ;;
1089 Set SMBIOS1 serial number.
1091 `sku`=`<Base64 encoded string>` ;;
1093 Set SMBIOS1 SKU string.
1099 `version`=`<Base64 encoded string>` ;;
1101 Set SMBIOS1 version.
1103 `smp`: `<integer> (1 - N)` ('default =' `1`)::
1105 The number of CPUs. Please use option -sockets instead.
1107 `sockets`: `<integer> (1 - N)` ('default =' `1`)::
1109 The number of CPU sockets.
1111 `spice_enhancements`: `[foldersharing=<1|0>] [,videostreaming=<off|all|filter>]` ::
1113 Configure additional enhancements for SPICE.
1115 `foldersharing`=`<boolean>` ('default =' `0`);;
1117 Enable folder sharing via SPICE. Needs Spice-WebDAV daemon installed in the VM.
1119 `videostreaming`=`<all | filter | off>` ('default =' `off`);;
1121 Enable video streaming. Uses compression for detected video streams.
1123 `sshkeys`: `<string>` ::
1125 cloud-init: Setup public SSH keys (one key per line, OpenSSH format).
1127 `startdate`: `(now | YYYY-MM-DD | YYYY-MM-DDTHH:MM:SS)` ('default =' `now`)::
1129 Set the initial date of the real time clock. Valid format for date are:'now' or '2006-06-17T16:01:21' or '2006-06-17'.
1131 `startup`: `[[order=]\d+] [,up=\d+] [,down=\d+] ` ::
1133 Startup and shutdown behavior. Order is a non-negative number defining the general startup order. Shutdown in done with reverse ordering. Additionally you can set the 'up' or 'down' delay in seconds, which specifies a delay to wait before the next VM is started or stopped.
1135 `tablet`: `<boolean>` ('default =' `1`)::
1137 Enable/disable the USB tablet device. This device is usually needed to allow absolute mouse positioning with VNC. Else the mouse runs out of sync with normal VNC clients. If you're running lots of console-only guests on one host, you may consider disabling this to save some context switches. This is turned off by default if you use spice (`qm set <vmid> --vga qxl`).
1139 `tags`: `<string>` ::
1141 Tags of the VM. This is only meta information.
1143 `tdf`: `<boolean>` ('default =' `0`)::
1145 Enable/disable time drift fix.
1147 `template`: `<boolean>` ('default =' `0`)::
1149 Enable/disable Template.
1151 `tpmstate0`: `[file=]<volume> [,size=<DiskSize>] [,version=<v1.2|v2.0>]` ::
1153 Configure a Disk for storing TPM state. The format is fixed to 'raw'.
1155 `file`=`<volume>` ;;
1157 The drive's backing volume.
1159 `size`=`<DiskSize>` ;;
1161 Disk size. This is purely informational and has no effect.
1163 `version`=`<v1.2 | v2.0>` ('default =' `v2.0`);;
1165 The TPM interface version. v2.0 is newer and should be preferred. Note that this cannot be changed later on.
1167 `unused[n]`: `[file=]<volume>` ::
1169 Reference to unused volumes. This is used internally, and should not be modified manually.
1171 `file`=`<volume>` ;;
1173 The drive's backing volume.
1175 `usb[n]`: `[host=]<HOSTUSBDEVICE|spice> [,usb3=<1|0>]` ::
1177 Configure an USB device (n is 0 to 4).
1179 `host`=`<HOSTUSBDEVICE|spice>` ;;
1181 The Host USB device or port or the value 'spice'. HOSTUSBDEVICE syntax is:
1183 'bus-port(.port)*' (decimal numbers) or
1184 'vendor_id:product_id' (hexadeciaml numbers) or
1187 You can use the 'lsusb -t' command to list existing usb devices.
1189 NOTE: This option allows direct access to host hardware. So it is no longer possible to migrate such
1190 machines - use with special care.
1192 The value 'spice' can be used to add a usb redirection devices for spice.
1194 `usb3`=`<boolean>` ('default =' `0`);;
1196 Specifies whether if given host option is a USB3 device or port.
1198 `vcpus`: `<integer> (1 - N)` ('default =' `0`)::
1200 Number of hotplugged vcpus.
1202 `vga`: `[[type=]<enum>] [,memory=<integer>]` ::
1204 Configure the VGA Hardware. If you want to use high resolution modes (>= 1280x1024x16) you may need to increase the vga memory option. Since QEMU 2.9 the default VGA display type is 'std' for all OS types besides some Windows versions (XP and older) which use 'cirrus'. The 'qxl' option enables the SPICE display server. For win* OS you can select how many independent displays you want, Linux guests can add displays them self.
1205 You can also run without any graphic card, using a serial device as terminal.
1207 `memory`=`<integer> (4 - 512)` ;;
1209 Sets the VGA memory (in MiB). Has no effect with serial display.
1211 `type`=`<cirrus | none | qxl | qxl2 | qxl3 | qxl4 | serial0 | serial1 | serial2 | serial3 | std | virtio | virtio-gl | vmware>` ('default =' `std`);;
1213 Select the VGA type.
1215 `virtio[n]`: `[file=]<volume> [,aio=<native|threads|io_uring>] [,backup=<1|0>] [,bps=<bps>] [,bps_max_length=<seconds>] [,bps_rd=<bps>] [,bps_rd_max_length=<seconds>] [,bps_wr=<bps>] [,bps_wr_max_length=<seconds>] [,cache=<enum>] [,cyls=<integer>] [,detect_zeroes=<1|0>] [,discard=<ignore|on>] [,format=<enum>] [,heads=<integer>] [,iops=<iops>] [,iops_max=<iops>] [,iops_max_length=<seconds>] [,iops_rd=<iops>] [,iops_rd_max=<iops>] [,iops_rd_max_length=<seconds>] [,iops_wr=<iops>] [,iops_wr_max=<iops>] [,iops_wr_max_length=<seconds>] [,iothread=<1|0>] [,mbps=<mbps>] [,mbps_max=<mbps>] [,mbps_rd=<mbps>] [,mbps_rd_max=<mbps>] [,mbps_wr=<mbps>] [,mbps_wr_max=<mbps>] [,media=<cdrom|disk>] [,replicate=<1|0>] [,rerror=<ignore|report|stop>] [,ro=<1|0>] [,secs=<integer>] [,serial=<serial>] [,shared=<1|0>] [,size=<DiskSize>] [,snapshot=<1|0>] [,trans=<none|lba|auto>] [,werror=<enum>]` ::
1217 Use volume as VIRTIO hard disk (n is 0 to 15).
1219 `aio`=`<io_uring | native | threads>` ;;
1223 `backup`=`<boolean>` ;;
1225 Whether the drive should be included when making backups.
1229 Maximum r/w speed in bytes per second.
1231 `bps_max_length`=`<seconds>` ;;
1233 Maximum length of I/O bursts in seconds.
1237 Maximum read speed in bytes per second.
1239 `bps_rd_max_length`=`<seconds>` ;;
1241 Maximum length of read I/O bursts in seconds.
1245 Maximum write speed in bytes per second.
1247 `bps_wr_max_length`=`<seconds>` ;;
1249 Maximum length of write I/O bursts in seconds.
1251 `cache`=`<directsync | none | unsafe | writeback | writethrough>` ;;
1253 The drive's cache mode
1255 `cyls`=`<integer>` ;;
1257 Force the drive's physical geometry to have a specific cylinder count.
1259 `detect_zeroes`=`<boolean>` ;;
1261 Controls whether to detect and try to optimize writes of zeroes.
1263 `discard`=`<ignore | on>` ;;
1265 Controls whether to pass discard/trim requests to the underlying storage.
1267 `file`=`<volume>` ;;
1269 The drive's backing volume.
1271 `format`=`<cloop | cow | qcow | qcow2 | qed | raw | vmdk>` ;;
1273 The drive's backing file's data format.
1275 `heads`=`<integer>` ;;
1277 Force the drive's physical geometry to have a specific head count.
1281 Maximum r/w I/O in operations per second.
1283 `iops_max`=`<iops>` ;;
1285 Maximum unthrottled r/w I/O pool in operations per second.
1287 `iops_max_length`=`<seconds>` ;;
1289 Maximum length of I/O bursts in seconds.
1291 `iops_rd`=`<iops>` ;;
1293 Maximum read I/O in operations per second.
1295 `iops_rd_max`=`<iops>` ;;
1297 Maximum unthrottled read I/O pool in operations per second.
1299 `iops_rd_max_length`=`<seconds>` ;;
1301 Maximum length of read I/O bursts in seconds.
1303 `iops_wr`=`<iops>` ;;
1305 Maximum write I/O in operations per second.
1307 `iops_wr_max`=`<iops>` ;;
1309 Maximum unthrottled write I/O pool in operations per second.
1311 `iops_wr_max_length`=`<seconds>` ;;
1313 Maximum length of write I/O bursts in seconds.
1315 `iothread`=`<boolean>` ;;
1317 Whether to use iothreads for this drive
1321 Maximum r/w speed in megabytes per second.
1323 `mbps_max`=`<mbps>` ;;
1325 Maximum unthrottled r/w pool in megabytes per second.
1327 `mbps_rd`=`<mbps>` ;;
1329 Maximum read speed in megabytes per second.
1331 `mbps_rd_max`=`<mbps>` ;;
1333 Maximum unthrottled read pool in megabytes per second.
1335 `mbps_wr`=`<mbps>` ;;
1337 Maximum write speed in megabytes per second.
1339 `mbps_wr_max`=`<mbps>` ;;
1341 Maximum unthrottled write pool in megabytes per second.
1343 `media`=`<cdrom | disk>` ('default =' `disk`);;
1345 The drive's media type.
1347 `replicate`=`<boolean>` ('default =' `1`);;
1349 Whether the drive should considered for replication jobs.
1351 `rerror`=`<ignore | report | stop>` ;;
1357 Whether the drive is read-only.
1359 `secs`=`<integer>` ;;
1361 Force the drive's physical geometry to have a specific sector count.
1363 `serial`=`<serial>` ;;
1365 The drive's reported serial number, url-encoded, up to 20 bytes long.
1367 `shared`=`<boolean>` ('default =' `0`);;
1369 Mark this locally-managed volume as available on all nodes.
1371 WARNING: This option does not share the volume automatically, it assumes it is shared already!
1373 `size`=`<DiskSize>` ;;
1375 Disk size. This is purely informational and has no effect.
1377 `snapshot`=`<boolean>` ;;
1379 Controls qemu's snapshot mode feature. If activated, changes made to the disk are temporary and will be discarded when the VM is shutdown.
1381 `trans`=`<auto | lba | none>` ;;
1383 Force disk geometry bios translation mode.
1385 `werror`=`<enospc | ignore | report | stop>` ;;
1389 `vmgenid`: `<UUID>` ('default =' `1 (autogenerated)`)::
1391 The VM generation ID (vmgenid) device exposes a 128-bit integer value identifier to the guest OS. This allows to notify the guest operating system when the virtual machine is executed with a different configuration (e.g. snapshot execution or creation from a template). The guest operating system notices the change, and is then able to react as appropriate by marking its copies of distributed databases as dirty, re-initializing its random number generator, etc.
1392 Note that auto-creation only works when done through API/CLI create or update methods, but not when manually editing the config file.
1394 `vmstatestorage`: `<string>` ::
1396 Default storage for VM state volumes/files.
1398 `watchdog`: `[[model=]<i6300esb|ib700>] [,action=<enum>]` ::
1400 Create a virtual hardware watchdog device. Once enabled (by a guest action), the watchdog must be periodically polled by an agent inside the guest or else the watchdog will reset the guest (or execute the respective action specified)
1402 `action`=`<debug | none | pause | poweroff | reset | shutdown>` ;;
1404 The action to perform if after activation the guest fails to poll the watchdog in time.
1406 `model`=`<i6300esb | ib700>` ('default =' `i6300esb`);;
1408 Watchdog type to emulate.