topic Re: LUN shared by multiple VM's in Operating System - HP-UX

LUN shared by multiple VM's

Deepak Seth_1 — Mon, 08 Feb 2010 19:25:27 GMT

I need mount a LUN (actually a snap LUN from clariion) to different VM guest . Was able to add the device on first VM but then tried to make LUN visible to other VM also but it failed with the following error message.

This command running from VM host system .

/opt/hpvm/bin/hpvmmodify -P hervmd03 -F -a disk:avio_stor::disk:/dev/rdisk/disk7>
hpvmmodify: ERROR (hervmd03): Duplicate backing device '/dev/rdisk/disk72'.
hpvmmodify: ERROR (hervmd03): Unable to add device '/dev/rdisk/disk72'.
hpvmmodify: Unable to create device disk:avio_stor::disk:/dev/rdisk/disk72.
hpvmmodify: Unable to modify the guest.

Re: LUN shared by multiple VM's

Deepak Seth_1 — Mon, 08 Feb 2010 19:35:46 GMT

just notice one more thing , the GUI (System Management Page) option is however showing the above LUN is shared by both VM's .

However ioscan is not showing it on guest .
Do you think rebooting guest will fix the issue ?

Re: LUN shared by multiple VM's

Deepak Seth_1 — Mon, 08 Feb 2010 21:56:56 GMT

Issues resolved after reboot.

I don't like the the way HP VM works , I need to reboot the VM anytime i need to add a LUN - not good . Is i am missing something ?

Re: LUN shared by multiple VM's

Prasanth Thomas — Tue, 09 Feb 2010 03:01:09 GMT

did you get any error message from storage end ?

Regards,
PT.

Re: LUN shared by multiple VM's

Kapil Jha — Tue, 09 Feb 2010 03:25:36 GMT

Are you running any cluster over VMs, why you want to share same LUN to other VM.

Well it does not ask for reboot normally!!

Did you see any other issue?
what version of HPVM and HP-UX.

BR,
Kapil+

Re: LUN shared by multiple VM's

Deepak Seth_1 — Tue, 09 Feb 2010 17:42:40 GMT

These are clariion snap LUNS which needs to be mounted on both VM's from time to time (one at a time only).

T2767BC B.04.00 Integrity VM
ParMgr B.31.02.04.01 Partition Manager - HP-UX

We are on Sept,2008 patch level for Host and all the guest are on March,2009.