Vishal Gupta's Blog

RHEL 5.3 x64 disks

On a RHEL OS using LVM volume manager, you can extend the underlying disk and its associated filesytem (non-root) can be extended while its mounted.

• Extend the underlying virtual/SAN disks.

• Check the size of disk

#   fdisk -l

• Force the re-scan of disk, so that OS kernel can see the new size

# echo 1 > /sys/block/sdb/device/rescan

where disk extended was /dev/sdb

• Extend LVM physical volume size.

# pvs

# pvresize /dev/sdb

# pvs

• Extend LVM logical volume

# lvdisplay

# lvextend /dev/ora_vg/ora /dev/sdb

# lvdisplay

• Extend filesystem (online)

# df –h

# resize2fs /dev/ora_vg/ora

# df –h

Filesystem is extended.