topic Re: Force pvcreate on VxVM disk? in Operating System - HP-UX

Force pvcreate on VxVM disk?

Jose Vidal — Fri, 08 Sep 2000 20:16:17 GMT

Anyone know how to force a creation of a PV on a disk that had previously been defined as a Veritas VxVM disk.

Re: Force pvcreate on VxVM disk?

Alan Riggs — Fri, 08 Sep 2000 20:34:15 GMT

pvcreate -f /dev/rdsk/c?t?d?

Re: Force pvcreate on VxVM disk?

Rick Garland — Fri, 08 Sep 2000 20:42:44 GMT

This will tell the system that the disk is to be an LVM disk. Making a vxfs type of filesystem allows more control and less maintenance. If using the OnlineJfs, will not have to umount the filesaystem to extend (as an example). However, OnlineJfs is a cost product.

Re: Force pvcreate on VxVM disk?

Jose Vidal — Fri, 08 Sep 2000 22:52:09 GMT

I tried the "-f" option and I still get the following error.

# pvcreate -f /dev/rdsk/c2t6d0
pvcreate: Could not perform LVM operation on VxVM disk "/dev/rdsk/c2t6d0".
#

Is there an command that will clear the disk configuration?

Re: Force pvcreate on VxVM disk?

Denver Osborn — Fri, 08 Sep 2000 23:48:32 GMT

Check for LVM Commands Patch.

PHCO_18485 or better. Enhanced LVM to coexist with VxVM.

Re: Force pvcreate on VxVM disk?

James R. Ferguson — Fri, 08 Sep 2000 23:54:29 GMT

Jose:

pvcreate -f /dev/rdsk/cXtXdX is correct. However, the introduction of the VERITAS Volume Manager(VxVM) requires several enhancements for LVM coexistence with VxVM. You should obtain and load PHCO_21630. This should fix the problem you are having.

...JRF...

Re: Force pvcreate on VxVM disk?

Jose Vidal — Fri, 15 Sep 2000 19:37:25 GMT

My dilema is this.
I was running Veritas VM for a few weeks, and I had initialized some disks as VM disks. Prior to removing VM, I was able to remove all but the "rootdg" disks, after removing VM, I've reinitialized all the disk as LVM, except the one that was the "rootdg". This is the disk that I am unable to initialize using LVM.
Veritas wouldn't let me destroy the diskgroup info, and LVM doesn't let me create a new PV.

Re: Force pvcreate on VxVM disk?

James R. Ferguson — Fri, 15 Sep 2000 19:57:32 GMT

Hi:

Did you try PHCO_21630 or equivalent LVM cumulative patch? PHCO_21630 is for 11.0 so this may not be correct for your release.
What release are you on?

...JRF...

Re: Force pvcreate on VxVM disk?

Jose Vidal — Fri, 15 Sep 2000 19:59:19 GMT

Yes, that patch is already applied.
I'm running HPUX 11.00

Re: Force pvcreate on VxVM disk?

alberto vasquez — Fri, 15 Sep 2000 21:19:35 GMT

try
# dd if=/stand/vmunix of=/dev/rdsk/c#t#d# bs=64k
the pvcreate is detecting the presence of a VxVM private region on the disk
the dd should stomp on the header & allow you to pvcreate. I chose /stand/vmunix
because it is a fairly large file, any large file will do.

Re: Force pvcreate on VxVM disk?

Jose Vidal — Fri, 15 Sep 2000 21:38:17 GMT

Response Center,

The "dd" did the trick, I was able to add the disk to an existing VG.

Thanks.