1 Logical Volume Manager (LVM)
2 ----------------------------
3 include::attributes.txt[]
5 Most people install {pve} directly on a local disk. The {pve}
6 installation CD offers several options for local disk management, and
7 the current default setup uses LVM. The installer let you select a
8 single disk for such setup, and uses that disk as physical volume for
9 the **V**olume **G**roup (VG) 'pve'. The following output is from a
10 test installation using a small 8GB disk:
14 PV VG Fmt Attr PSize PFree
15 /dev/sda3 pve lvm2 a-- 7.87g 876.00m
18 VG #PV #LV #SN Attr VSize VFree
19 pve 1 3 0 wz--n- 7.87g 876.00m
22 The installer allocates three **L**ogical **V**olumes (LV) inside this
27 LV VG Attr LSize Pool Origin Data% Meta%
28 data pve twi-a-tz-- 4.38g 0.00 0.63
29 root pve -wi-ao---- 1.75g
30 swap pve -wi-ao---- 896.00m
33 root:: Formatted as 'ext4', and contains the operation system.
37 data:: This volume uses LVM-thin, and is used to store VM
38 images. LVM-thin is preferable for this task, because it offers
39 efficient support for snapshots and clones.
44 We highly recommend to use a hardware RAID controller (with BBU) for
45 such setups. This increases performance, provides redundancy, and make
46 disk replacements easier (hot-pluggable).
48 LVM itself does not need any special hardware, and memory requirements
55 We install two boot loaders by default. The first partition contains
56 the standard GRUB boot loader. The second partition is an **E**FI **S**ystem
57 **P**artition (ESP), which makes it possible to boot on EFI systems.