LVM and AIX

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Contents

Associated Information

Useful Links

Logical Volume Manager

enter lsdev -C -c disk to check disks available
create volume group using: mkvg -y "vgname" hdiskn
enter varyonvg vgname
To create logical volume enter: mklv -y "lvname volgrp n
e.g. mklv -y "testlv1" testvg 64 - will create a logical volume called testlv1 in volume group testvg of 64 logical partitions (to check the size of the physical partitions, run lsvg vgname)
To create a mirrored logical volume enter: mklv -y "lvname -c n volgrp n disk1 disk2
e.g. mklv -y "testlv2" -c 2 testvg 64 hdisk1 hdisk2 - will create a logical volume called testlv2 in volume group testvg with 2 copies of the 64 logical partitions on disks hdisk1 and hdisk2
create filesystem by entering crfs -v jfs -l lvname -m /mountdir -A yes
This will dreate a filesystem the same size as the logical volume, create the mount directory and include the filesystem in /etc/filesystems so it will be automatically mounted when the system is rebooted.

enter extendlv lvname size - to extend the named logical volumes by the number of physical partitions named by the size parameter
enter chfs -a size=+size /mountpoint - where size is in 512 byte blocks (can calculate this by (PP * 1000000)/512 ) and mountpoint is the physical mountpoint of the logical volume

lspv - list all disks on the system
lsvg - list all volume groups on the system
lsvg -l "vgname" - list all logical volumes in volume group
lsfs - list all filesystems in the system
mklvcopy -k lvname 2 pvname - will create a mirror copy of the named logical volume on named disk
lslv -m lvname - can be used to check logical volume mirrors
savevg - backup entire volume group
e.g savevg -i volgrp /dev/rmt1
restvg - restore from savevg backup
mirrorvg - mirror an entire volume group
e.g. mirrorvg -s rootvg