topic Re: HP9000, EVA6400, multipath in Operating System - HP-UX

HP9000, EVA6400, multipath

Russell W. Roth — Thu, 10 Jun 2010 12:53:27 GMT

I have 3 HP9000 systems that were connected to an EVA6400 by a storage consultant. I am being asked which multipath I/O we are using to connect to the EVA: SecurePath, PVlinks, etc. How do I find out?

Re: HP9000, EVA6400, multipath

SoorajCleris — Thu, 10 Jun 2010 13:13:33 GMT

Hi,

# swlist -l product | grep -i secure

will tell you if securepath is installed.

Regards,
Sooraj

Re: HP9000, EVA6400, multipath

S. Ney — Thu, 10 Jun 2010 13:24:06 GMT

If its an older hpux OS like 11.11 or 11.23 you can do a vgdisplay -v /dev/vgname of volume group that is attached to san. At the bottom of the output you should see:
--- Physical volumes ---
PV Name /dev/dsk/c9t0d1
PV Name /dev/dsk/c11t0d1 Alternate Link
PV Name /dev/dsk/c13t0d1 Alternate Link
PV Name /dev/dsk/c15t0d1 Alternate Link
PV Status available
Total PE 6398

You can also do swlist -l product > /tmp/product (for example) and see a list of installed products. You can look for products like SecurePath, EMCpower, etc. in order to find out if any 3rd party products are installed.

Re: HP9000, EVA6400, multipath

Russell W. Roth — Thu, 10 Jun 2010 13:40:12 GMT

swlist does not reveal SecurePath. So, I'm using ... what?

Re: HP9000, EVA6400, multipath

Russell W. Roth — Thu, 10 Jun 2010 13:48:07 GMT

And, yes, I can see the alternate links in vgdisplay. (fyi, I'm HP-UX 11.23)

Re: HP9000, EVA6400, multipath

Russell W. Roth — Thu, 10 Jun 2010 14:17:38 GMT

So, the answer appears to be, based on: http://docs.hp.com/en/11822/storagemulti-pathing-HPUX-SG.pdf
is LVM PVlinks.
Thanks for your time.

Re: HP9000, EVA6400, multipath

S. Ney — Thu, 10 Jun 2010 14:18:04 GMT

swlist -l product HPswsp (if secure path is installed)

If you don't see that output then the vgdisplay with alternate links indicates you have pvlinks configured. (LVM will use the primary PV link to access the LUN, the alternate links exist in case the primary path fails in which case LVM will automatically attempt to access the PV with the alternate link.)

Re: HP9000, EVA6400, multipath

Russell W. Roth — Thu, 10 Jun 2010 14:18:50 GMT

closing thread.