topic Re: Mounting Snapshot Disk on other HP-UX System in Operating System - HP-UX

Mounting Snapshot Disk on other HP-UX System

Muthyala — Mon, 22 May 2006 11:23:47 GMT

Hi
Currently were taking backup using Data Protector 5.5. It is doing the SnapShot of the HP-UX disk in the SAN storage (EVA5000).We are taking the> backup from this snapshot disk.

My question is can i mount this snapshot disk on another HP-UX server and access the data from this disk. since backup/restoration is taking long time. i thought i can mount this snapshot disk on another test HP-UX server in case of emergency to save time.
Can this be done?

Are is there anyother faster way of doing this.

Thanks
Srikanth

Re: Mounting Snapshot Disk on other HP-UX System

Ivan Ferreira — Mon, 22 May 2006 11:57:36 GMT

Yes it can be done, it should be the same procedure (except that vgchgid is not needed) and you need to present the vdisk to the other host, see this thread:

http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=1000416

Re: Mounting Snapshot Disk on other HP-UX System

Sheriff Andy — Mon, 22 May 2006 12:57:36 GMT

Yes,

This is what we do in our production environment for our backups.

We bring down our production volumes, snapclone, bring up our production volumes, then mount the snapclones on our backup server, then perform backups on our snapclones.

This process works very well.

Re: Mounting Snapshot Disk on other HP-UX System

Muthyala — Mon, 22 May 2006 13:00:31 GMT

Hi Sheriff

Thanks for your reply.Can you tell me detail how you do it on another HP-UX server.The steps involved in mounting the snapclone device.and also what precautions i need to take on this.Can you explain me in detial.

Thanks
srikanth

Re: Mounting Snapshot Disk on other HP-UX System

Sheriff Andy — Mon, 22 May 2006 13:15:04 GMT

First off you need to make sure that the snapclones are presented to your alternative ux server.

If you will follow Ivans link, it will show how to mount the disks to the alternative server. As he said as well, you do not need to do the vgchid on the volume group.

Once you get the volume group snapclones mounted on the alternative server, you can run your backups against it.

Re: Mounting Snapshot Disk on other HP-UX System

David Bellamy — Mon, 22 May 2006 16:35:22 GMT

Try this:
on system where clone disk are first do:
vgexport -v -p -s -m /etc/lvmconf/vgoracle.smap vgoracle
vgexport -v -p -m /etc/lvmconf/vgoracle.map vgoracle

next copy map files to other system.
make sure other system can see clone disk.
then do following steps:

vgchange -a n vgoracleBC
vgexport -v -m /dev/null vgoracleBC
mkdir /dev/vgoracleBC
mknod /dev/vgoracleBC/group c 64 0x120000
vgimport -v -m /etc/lvmconf/vgoracleBC.map /dev/vgoracleBC /dev/dsk/c15t2d4 /dev
/dsk/c15t2d5 /dev/dsk/c15t2d6

vgchange -c n /dev/vgoracleBC
vgchange -a y /dev/vgoracleBC
fsck -F vxfs -y /dev/vgoracleBC/rlvol1

mount /dev/vgoracleBC/lvol1 /ora1db01BC