topic Re: Discovering controllers paths ona VA7400 in Disk Enclosures

Discovering controllers paths ona VA7400

Domenico Viggiani — Tue, 23 Jul 2002 09:03:09 GMT

According to HP technical notes, it is highly suggested to configure VA7400 disk-array in such a way to use Controller1 for LUNs in RedundancyGroup1 and Controller 2 for LUNs in RedundancyGroup2.
I have a VA7400 connected by double path to two Brocade switches and from there to 2 hosts.
What is the easiest way to discover hosts device paths (/dev/dsk/cxdytz...) to Controller1 and Controller2?

Thanks in advance for any help

Re: Discovering controllers paths ona VA7400

David Bell_1 — Tue, 23 Jul 2002 13:16:50 GMT

Domenico,

See if the attached pdf's help.

Dave

Re: Discovering controllers paths ona VA7400

David Bell_1 — Tue, 23 Jul 2002 13:18:42 GMT

Domenico,

The first attachment is for Private Loop. This attachment is for fabric attached.

HTH,

Dave

Re: Discovering controllers paths ona VA7400

Vincent Fleming — Tue, 23 Jul 2002 14:25:23 GMT

If you look at David's attachment, you can use the ALPA to determine which controller is which - xref the ALPA with the config in CommandView of the controllers.

You could also disconnect a path (be sure you're using some kind of path failover, such as PVLinks or AutoPath) or be offline, and look at which devices become NO_HW in "ioscan".

Good luck!

Re: Discovering controllers paths ona VA7400

Domenico Viggiani — Wed, 24 Jul 2002 07:16:30 GMT

In 'ioscan' output, AL_PA is always 0.
Instead, using Domain, I'm able to discover the switch.
Using Area, I'm able to discover the switch port.
Comparing 'nsswitch' output with Node WWN line in 'armdsp -a' output, I'm able to discover the controller.

Is it right?