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LVM you can increase / decrease size without any issue.
But it is important you do it in proper steps.

Reducing Size

umount /home
e2fsck -y /dev/mapper/VolGroup00-LogVol00
resize2fs -f /dev/mapper/VolGroup00-LogVol00 1536M
lvreduce -L1536M /dev/mapper/VolGroup00-LogVol00 
mount /home

Increasing Size

umount /opt/
e2fsck -y /dev/mapper/VolGroup00-LogVol02
lvextend -L+512M /dev/mapper/VolGroup00-LogVol02
resize2fs /dev/mapper/VolGroup00-LogVol02
mount /opt
lvm.1306961984.txt.gz · Last modified: 2011/06/01 20:59 by k2patel