Growing Clustered LVM2 volumes

[Joel Heenan]

I am looking for detailed instructions on how to grow a LVM2 GFS volume.


I have a 3 node cluster with a shared disk running GFS across them. I
performed the following steps but was not successful:

1. Resized the disk on SAN from 50GB to 100GB
2. Halted the cluster and unmounted the disk on all nodes
3. Rebooted node 3 and executed pvresize. This command did not pick up
the new size of the disk (but fdisk -l did). 
4. Using fdisk deleted and re-created the LVM partition so that it was
now using the entire disk
5. Restarted node 3
6. At this point node 3 no longer saw the disk as containing the LVM
volume and I believe I had probably corrupted my data. I used pvcreate
with the uuid flag to try and revive the data and then restored the vg
information from backup from one of the other nodes but it was not
sucessful.

My question is, given a 3 node cluster with GFS running on a clustered
LVM2 volume, how do I resize the physical volume from 50GB to 100GB

The servers are all running:
"Red Hat Enterprise Linux AS release 4 (Nahant Update 5)"

They are AMD 64-bit DL585's. Our san is an EVA8000. The cards are all
QLogic HBA's.

Thanks

Joel

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