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Hi

Our customer has a small MSA1000 config as per the following:
ES45 x 2
MSA1000 x 1 with dual controllers in Active/Passive config and 2 x SAN switch 2/8.

The fibre cards in the Alpha's are dual port, and have one cable going to each san switch.

The problem is when a fibre cable is removed from the host controller, the server does not switch over to use the other path to talk to the disks.

Any ideas why this could be?

Thanks,
Nibla

Hi Nibla,
You didn't mention which OS but it can only be VMS or Tru64 Unix.
I would suggest you start by checking to see how many paths are available at the OS end.
To do this:
VMS = $ show dev d/multi
Tru64 = # hwmgr v d
find your disks then # hwmgr -show scsi -id [get number from above] -full
I do not know MSA's I'm afraid but for an EVA you should see 4 paths for each device [8000 should see 8 paths]
If you do not "see" all the paths then it could be a fabric or HBA problem but I suspect it is to do with how the MSA is set up and the code it is running? I am not 100% on this, as I said I do not know MSA's so you may want to check the above and come back with some more info on your MSA rev numbers.

Regards,
MEA[T]

Hi MEA[T],
Thanks for the reply.
The alpha's are running VMS.

We have a query open with HP so hopefully we should resolve this soon...

Thanks again,
Nibla

Hi Nibla,
Please feel free to post the resolution, it may help other people.
Regards,
MEA[T]

Hi

This is the advice from support which we followed:

The available connections to the MSA have not been configured correctly for the VMS operating system. The Online Connections are showing as set for <default> connection type. Whereas the offline connections have been configured for VMS. Please have the online connections configured correctly for the VMS operating system See the output below :

abc> show connections

Connection Name: <Unknown>
Host WWNN = 20000000-C95D8B37
Host WWPN = 10000000-C95D8B37
Profile Name = Default <---------
Unit Offset = 0
Controller 2 Port 1 Status = Online

Connection Name: <Unknown>
Host WWNN = 20000000-C95D8B38
Host WWPN = 10000000-C95D8B38
Profile Name = Default <-----------
Unit Offset = 0
Controller 1 Port 1 Status = Online

Connection Name: PSB1B
Host WWNN = 20000000-C95D338A
Host WWPN = 10000000-C95D338A
Profile Name = OpenVMS
Unit Offset = 0


Connection Name: <PSB1A>
Host WWNN = 20000000-C95D3399
Host WWPN = 20000000-C95D3399
Profile Name = OpenVMS
Unit Offset = 0

Once done, please ensure that all Paths are available

$ show dev/multi

Check the lun is available on each path

$ set dev DGx<id> /path = <path id>

Ensure that the device is available on the path

$ Set def DGx<id>:[000000]

$ dir

$ set dev DGx<id> /path = <next path id>

Ensure that the device is available on the path

$ Set def DGx<id>:[000000]

$ dir

We also dropped down to >>> and ran wwidmgr quickset all

All seems to work now.

Regards
Nib.