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