topic Re: LVM info from new PV in Operating System - HP-UX

LVM info from new PV

BT Ireland — Thu, 05 Aug 2010 08:28:25 GMT

Hi,

I am writing scripts to automate a migration of HP-UX 11.11 servers from one FC switch to another.

I have the export scripts written to vgreduce the PV's from one path and I'm trying to write a script to automate the import after the device files change.

Once the HBA is moved to the new FC switch and the ioscan & insf creates the new devices files I can use vgscan to list all the new devices and their VGs.

However, how can I determine which VG the new devices belong to?

root@locutus:/migrate/mds/bin # pvdisplay /dev/dsk/c43t1d7
pvdisplay: Couldn't find the volume group to which
physical volume "/dev/dsk/c43t1d7" belongs.
pvdisplay: Cannot display physical volume "/dev/dsk/c43t1d7".

root@locutus:/migrate/mds/bin # pvdisplay -l /dev/dsk/c43t1d7
/dev/dsk/c43t1d7:LVM_Disk=yes

root@locutus:/migrate/mds/bin # diskinfo /dev/rdsk/c43t1d7
SCSI describe of /dev/rdsk/c43t1d7:
vendor: HP
product id: OPEN-V
type: direct access
size: 48000 Kbytes
bytes per sector: 512
root@locutus:/migrate/mds/bin #

regards,
Shane

Re: LVM info from new PV

Torsten. — Thu, 05 Aug 2010 08:32:33 GMT

Consider to use xpinfo command and compare the results or run vgscan in preview mode.

Re: LVM info from new PV

James R. Ferguson — Thu, 05 Aug 2010 11:52:05 GMT

Hi Shane:

You could read the LVM metadata of the raw devices to see which ones share a common VGID.

See my post in this thread:

http://forums.itrc.hp.com/service/forums/questionanswer.do?threadId=1098858

Regards!

...JRF...

Re: LVM info from new PV

rariasn — Thu, 05 Aug 2010 11:54:24 GMT

Hi,

Get PVID and GID from all ctds.

http://forums11.itrc.hp.com/service/forums/questionanswer.do?threadId=1171205

rgs,

Re: LVM info from new PV

Deeos — Thu, 05 Aug 2010 12:00:51 GMT

hi,

You can use

#pvdisplay /dev/dsk/cxtxdx|more

it will let you know the VG group associated with this disk.

Regards
Deeos

Re: LVM info from new PV

BT Ireland — Thu, 05 Aug 2010 13:45:00 GMT

Hi guys,

Thanks for all your responses.

Our servers are connected to HP XP storage and HP EVA storage with multiple paths to each LUN.

After an ioscan & insf I am using xpinfo & evainfo to determine the new & existing LUN information.

By cross referencing the XP CU:LDEVs & the EVA WWNN I am able to determine which Volume Group each device belongs to.

Thanks again
regards,
Shane

Re: LVM info from new PV

BT Ireland — Thu, 05 Aug 2010 13:45:41 GMT

Thanks to all