Montarea volumelor logice in Linux (LVM)

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Uneori aveti nevoie sa faceti mount la volume facute cu LVM si nu puteti utiliza clasicul mount direct pe device. (sdXX)

Cam asa arata partiitia lvm vazuta la fdisk:

root@debian:~# fdisk -l /dev/sda

Disk /dev/sda: 240.1 GB, 240057409536 bytes
255 heads, 63 sectors/track, 29185 cylinders, total 468862128 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0001f2d1

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *        2048      514047      256000   83  Linux
/dev/sda2          514048   468860927   234173440   8e  [B]Linux LVM[/B]
root@debian:~#

Contrar asteptarilor, se face extrem de simplu utilizand utilitarul lvdisplay pentru a afisa volumele:

root@debian:~# lvdisplay 
  --- Logical volume ---
  LV Path                /dev/vg/root
  LV Name                root
  VG Name                vg
  LV UUID                QzUpJS-161D-2cwR-n0fs-jPRw-wkaS-cZ6SrR
  LV Write Access        read/write
  LV Creation host, time devel02.vm, 2014-11-25 14:40:45 +0000
  LV Status              available
  # open                 0
  LV Size                214.62 GiB
  Current LE             6868
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           252:0

  --- Logical volume ---
  LV Path                /dev/vg/tmp
  LV Name                tmp
  VG Name                vg
  LV UUID                7QpmhZ-8Fi1-ajzg-8803-2Bl1-qdee-KgyszE
  LV Write Access        read/write
  LV Creation host, time devel02.vm, 2014-11-25 14:41:06 +0000
  LV Status              available
  # open                 0
  LV Size                1.00 GiB
  Current LE             32
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           252:1

  --- Logical volume ---
  LV Path                /dev/vg/swap
  LV Name                swap
  VG Name                vg
  LV UUID                IXmZCW-rC3A-v8da-aLnQ-4jqA-amhq-TqRfhQ
  LV Write Access        read/write
  LV Creation host, time devel02.vm, 2014-11-25 14:41:06 +0000
  LV Status              available
  # open                 0
  LV Size                7.69 GiB
  Current LE             246
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           252:2

Volumul care ne intereseaza este 'root' (lv name). Acum putem face mount folosind LV Path de la root + un director temporar

root@debian:~# mkdir x
root@debian:~# mount /dev/vg/root x/

Mai multe despre LVM puteti citi aici: Logical Volume Manager (Linux) - Wikipedia, the free encyclopedia