topic Re: pvextend in Operating System - Linux

pvextend

Steven Boyer — Fri, 22 Aug 2008 12:32:42 GMT

I have a one for one mapping of a LUN on my storage system that is one disk in PV which is the only disk in a VG. We have done the mkdir and mknode but no lvgreate.

The question is if we grow the size of the LUN on the storage system can we use pvextend on the PV to show the increased size.

Re: pvextend

Ivan Ferreira — Fri, 22 Aug 2008 13:03:00 GMT

In linux, the command is pvresize.

Re: pvextend

Steven Boyer — Fri, 22 Aug 2008 13:06:47 GMT

its HPUX 11.11

Re: pvextend

skt_skt — Mon, 25 Aug 2008 17:02:08 GMT

there are steps avaialble for increase the LUN size online . But not tested myself so far. Check with you storage support people to get the right document

Re: pvextend

Steven E. Protter — Tue, 26 Aug 2008 09:40:00 GMT

Shalom,

This is a very problematic area of HP-UX.

The only possible, reliable means of making this happen on HP-UX is to reboot the system.

It is possible though after a reboot that the system will still not recognize its new size. With HP storage this is easier. With other vendors it is sometimes impossible to make happen.

The critical part of process of recognizing larger space is pvcreate, which can be a little destructive and should not be used on a physical volume that is already part of a volume group.

With HP-UX, in general, the storage group would present me with new storage at a larger size, which could be recognized after a reboot. Then I had to copy the data across from the old volume to the new, after setting up the logical volume structure and needed file systems.

SEP