Discovering controllers paths ona VA7400

[Domenico Viggiani]

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

[David Bell_1]

Domenico,

See if the attached pdf's help.

Dave

[David Bell_1 · Accepted solution]

Domenico,

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

HTH,

Dave

[Vincent Fleming]

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!

[Domenico Viggiani]

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?