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Discovering controllers paths ona VA7400

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Domenico Viggiani
Super Advisor

Discovering controllers paths ona VA7400

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
4 REPLIES
David Bell_1
Honored Contributor

Re: Discovering controllers paths ona VA7400

Domenico,

See if the attached pdf's help.

Dave
David Bell_1
Honored Contributor
Solution

Re: Discovering controllers paths ona VA7400

Domenico,

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

HTH,

Dave
Vincent Fleming
Honored Contributor

Re: Discovering controllers paths ona VA7400

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!
No matter where you go, there you are.
Domenico Viggiani
Super Advisor

Re: Discovering controllers paths ona VA7400

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?