• ​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
• ​＠IT：LVMによる自動バックアップ・システムの構築（1/3）
• ​Chapter 11. Using LVM with DRBD
  • ​第11章 DRBDとLVMの使用
• ​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)
• ​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