[[PageOutline]]

 * [http://www.usupi.org/sysad/166.html LVM のスナップショット機能を使ってみる - いますぐ実践! Linuxシステム管理 / Vol.166]
 * [http://www.atmarkit.co.jp/flinux/rensai/root06/root06a.html ＠IT：LVMによる自動バックアップ・システムの構築（1/3）]
 * [http://www.drbd.org/users-guide/ch-lvm.html Chapter 11. Using LVM with DRBD]
  * [http://www.drbd.jp/users-guide/ch-lvm.html 第11章 DRBDとLVMの使用]
 * [http://thinkit.co.jp/free/compare/5/9/ ThinkIT 第9回：バックアップにおけるスナップショットの活用 (1/3)]
 * [http://okkun-lab.rd.fukuoka-u.ac.jp/wiki/?Tips%2FLinux%2FLVM Tips/Linux/LVM - 福岡大学奥村研究室 - okkun-lab Pukiwiki!]

 = lvchange/vgchange -ay =
 * root@Knoppix:~# vgdisplay -v
{{{
    Finding all volume groups
    Finding volume group "vgnfs"
  --- Volume group ---
  VG Name               vgnfs
  System ID
  Format                lvm2
  Metadata Areas        1
  Metadata Sequence No  2
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                1
  Open LV               0
  Max PV                0
  Cur PV                1
  Act PV                1
  VG Size               1.94 GB
  PE Size               32.00 MB
  Total PE              62
  Alloc PE / Size       48 / 1.50 GB
  Free  PE / Size       14 / 448.00 MB
  VG UUID               I6vVoh-6gCJ-9uvA-v2MV-Fyva-7J8v-Cvftfi

  --- Logical volume ---
  LV Name                /dev/vgnfs/drbd
  VG Name                vgnfs
  LV UUID                dNxdNj-hZCZ-GMrC-woMk-0hA2-f3oR-sBsrHI
  LV Write Access        read/write
  LV Status              NOT available
  LV Size                1.50 GB
  Current LE             48
  Segments               1
  Allocation             inherit
  Read ahead sectors     0

  --- Physical volumes ---
  PV Name               /dev/md0
  PV UUID               Z2JXRP-fa5g-SYS5-xzMs-Lq8C-1Jbh-QPKihr
  PV Status             allocatable
  Total PE / Free PE    62 / 14

}}}
  * LV is "NOT available"

 * root@Knoppix:~# lvchange -ay /dev/vgnfs/drbd
 * root@Knoppix:~# vgchange -ay
{{{
  1 logical volume(s) in volume group "vgnfs" now active
}}}

 * root@Knoppix:~# vgdisplay -v
{{{
    Finding all volume groups
    Finding volume group "vgnfs"
  --- Volume group ---
  VG Name               vgnfs
  System ID
  Format                lvm2
  Metadata Areas        1
  Metadata Sequence No  2
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                1
  Open LV               0
  Max PV                0
  Cur PV                1
  Act PV                1
  VG Size               1.94 GB
  PE Size               32.00 MB
  Total PE              62
  Alloc PE / Size       48 / 1.50 GB
  Free  PE / Size       14 / 448.00 MB
  VG UUID               I6vVoh-6gCJ-9uvA-v2MV-Fyva-7J8v-Cvftfi

  --- Logical volume ---
  LV Name                /dev/vgnfs/drbd
  VG Name                vgnfs
  LV UUID                dNxdNj-hZCZ-GMrC-woMk-0hA2-f3oR-sBsrHI
  LV Write Access        read/write
  LV Status              available
  # open                 0
  LV Size                1.50 GB
  Current LE             48
  Segments               1
  Allocation             inherit
  Read ahead sectors     0
  Block device           254:0

  --- Physical volumes ---
  PV Name               /dev/md0
  PV UUID               Z2JXRP-fa5g-SYS5-xzMs-Lq8C-1Jbh-QPKihr
  PV Status             allocatable
  Total PE / Free PE    62 / 14

}}}