lvm.rst
author Oleksandr Gavenko <gavenkoa@gmail.com>
Mon, 01 Dec 2008 22:44:15 +0200
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permissions -rw-r--r--
init
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-*- outline -*-
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* Debian package.
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  $ sudo apt-get --install lvm
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* See partitions.
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  $ sudo sfdisk -l
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or use gparted(1).
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* Setup physical volume.
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  $ sudo pvcreate /dev/sdc3
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  Physical volume "/dev/sdc3" successfully created
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* Setup volume group.
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  $ sudo vgcreate vg0 /dev/sdc3
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  Volume group "vg0" successfully created
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  $ sudo vgdisplay 
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  --- Volume group ---
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  VG Name               vg0
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  System ID             
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  Format                lvm2
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  Metadata Areas        1
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  Metadata Sequence No  1
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  VG Access             read/write
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  VG Status             resizable
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  MAX LV                0
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  Cur LV                0
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  Open LV               0
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  Max PV                0
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  Cur PV                1
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  Act PV                1
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  VG Size               77.22 GB
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  PE Size               4.00 MB
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  Total PE              19769
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  Alloc PE / Size       0 / 0   
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  Free  PE / Size       19769 / 77.22 GB
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  VG UUID               ZOQvrP-PnJ2-kKsH-7aLU-eOa3-K5M2-sRstJH
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* Create logical volume.
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  $ sudo lvcreate -L 10G -n home vg0
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  Logical volume "home" created
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* Create fs on logical volume.
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  $  sudo mke2fs -j /dev/vg0/home
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  mke2fs 1.40-WIP (14-Nov-2006)
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  Filesystem label=
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  OS type: Linux
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  Block size=4096 (log=2)
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  Fragment size=4096 (log=2)
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  1310720 inodes, 2621440 blocks
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  131072 blocks (5.00%) reserved for the super user
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  First data block=0
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  Maximum filesystem blocks=2684354560
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  80 block groups
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  32768 blocks per group, 32768 fragments per group
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  16384 inodes per group
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  Superblock backups stored on blocks:
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          32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632
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  Writing inode tables: done
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  Creating journal (32768 blocks): done
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  Writing superblocks and filesystem accounting information: done
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* Remove logical volume.
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  $ lvremove  /dev/vg0/home
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* Move home dir to lvm.
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  $ su
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  ...
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  $ mv /home /home2
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  $ lvcreate -L 10G -n home vg0
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  $ mke2fs -j /dev/vg0/home
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  $ emacs /etc/fstab
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  ...
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  $ cat /etc/fstab
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  ...
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  /dev/vg0/home   /home  ext3  defaults  0  2
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  ...
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  $ mount -a
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  $ (cd /home2; tar -cf - .) | (cd /home; tar -xpf -)
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  $ rm -r /home2
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* Creating swap on lvm.
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  $ su
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  ...
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  $ lvcreate -L 1G -n swap vg0
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  $ mkswap -v1 /dev/vg0/swap
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  $ emacs /etc/fstab
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  ...
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  $ cat /etc/fstab
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  ...
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  /dev/vg0/swap   swap  swap  defaults  0  0
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  ...
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  $ swapon -a
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