topic LVM Issue in Operating System - HP-UX

LVM Issue

Ernesto Rincon — Fri, 06 Oct 2006 16:40:27 GMT

Hi:

We have configured a file system of 2 Tb size (/dev/vg01/lvol1). We need to extend it to a final size of 6.5 Tb. The respective volume group will be extended with 76 disks of 60 Gb each. My question is: with the configuration of the volume group (included in the attachment) can we will extend the file system to 6.5 Tb final size? O we need to recreate the volume group with other specifications?
Somebody can help me?
Thanks

Re: LVM Issue

IT_2007 — Fri, 06 Oct 2006 16:58:45 GMT

You won't be able to do it based on your PE size 64MB because it comes to logical volume size

/dev/vg01/lvol1 = 65535 X 64MB = 4194240MB = 4.1TB max.

See more information in the link:

http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=1065778

Re: LVM Issue

Bill Hassell — Fri, 06 Oct 2006 17:36:16 GMT

It depends also on your version of HP-UX and your filesystem version. This will give you the maximum sizes:

http://www.docs.hp.com/en/5971-2383/5971-2383.pdf

Now, *IF* your VxFS filesystem has been converted to version 5, you can have a filesystem up to 32Tb. *BUT* only with VxVM 3.5 only (not LVM) and OnLineJFS license for greater than 2 TB file system. The HP-UX 11i V2 (B.11.23) September 2004 release is required to use file systems greater than 16 TB. Otherwise, 2 Tb is the LVM limit.

Note also that to increase the PE size from 64 to the max of 256, you'll have to rebuild the entire volume group (destroys all vg0 volumes).

Re: LVM Issue

Ernesto Rincon — Fri, 06 Oct 2006 19:12:48 GMT

Thanks a lot IT & Bill, your comments were very usefull.

Regards.