topic Re: Replace disks in PVG in Operating System - HP-UX

Replace disks in PVG

swaggart — Tue, 27 Apr 2010 07:10:25 GMT

Hi,

HP-UX 11iv1.
Have a volume group with disks organized in two PVG's, and logical volumes are mirrored between the two PVG's.
We want to replace some disks in one of the PVG's. How to do it ?

Regards,
Tommy

Re: Replace disks in PVG

SoorajCleris — Tue, 27 Apr 2010 07:20:53 GMT

Hi ,

If you are using the same disk file ( hardware path) no need to do anything,

else just put entry of new device file under the group by editing /etc/lvmpvg.
and then follow the procedure.

As you are REPLACING the disk , nothing to do with PVG and lvmPVG

regards,
Sooraj

Re: Replace disks in PVG

swaggart — Tue, 27 Apr 2010 07:23:49 GMT

Maybe some vital additional info.

It is disks from SAN, and we want to replace some luns with others.

Re: Replace disks in PVG

swaggart — Tue, 27 Apr 2010 07:35:39 GMT

The logical volumes are also set up with PVG-strict option.

Re: Replace disks in PVG

SoorajCleris — Tue, 27 Apr 2010 08:04:59 GMT

Hi,

/etc/lvmpvg is a ascii file where you create two groups and say , this disks belong to different group ( normally different controllers, pvg strict policy is used to give redundancy in case of a contrleer failure).

As you are replacing the existing disk, ( idealy you have the same dsf cxtxdx), that dsf will be already there in lvmpvg.

If you are adding a new disk, just add that dsf under the grup by editing lvmpvg.

Regards,
Sooraj

Re: Replace disks in PVG

Benoy Daniel — Tue, 27 Apr 2010 23:43:52 GMT

Remove the mirror belongs to particular PVG where disk need to replace. Replace disk and mirror it back.

Re: Replace disks in PVG

Raj Briden — Wed, 28 Apr 2010 00:46:32 GMT

AS daniel told

mirror belongs to particular PVG where disk need to replace and mirror it again ,

Need to check or edit /etc/lvmpvg, only if the hardware paths differs from the Old bad disk HW path.

Re: Replace disks in PVG

raghu_14 — Wed, 12 May 2010 07:45:26 GMT

Hello Tommy,

It is not clear as to why do you want to replace the disk.

If in case you are replacing then make sure you replace the disk with the same size or bigger disk.

There is a specific guide to replace a disk under LVM control.

http://h20000.www2.hp.com/bizsupport/TechSupport/CoreRedirect.jsp?redirectReason=DocIndexPDF&prodSeriesId=3367813&targetPage=http%3A%2F%2Fbizsupport2.austin.hp.com%2Fbc%2Fdocs%2Fsupport%2FSupportManual%2Fc01911837%2Fc01911837.pdf

You may follow the flowchart at page no. 29. I think it will help you.

Regards,
Raghu

Re: Replace disks in PVG

R.O. — Wed, 12 May 2010 08:33:25 GMT

Hi,

You can replace the disks you want with "pvmove" and then replace the old dsf files by the new ones in file "/etc/lvmpvg".

Regards,