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MSA 1000 controller

Posted on 2009-05-15
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I have msa1000 san storage that is already connected to a server with win2000 with secure path software installed for multipathing . I am setting up new server with win2003, after I connected cables to the fiber cards, under the device manager, under other devices, I see "Compaq MSA fabric SW 6 SCSI Enclosure Device" with a ? next to it. Also in Array configuration utility I see one controller status is 'standby' the other is 'failed redundancy path'.
 What am I missing here?  Shoud I download MPIO software on the new server? Please help
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Question by:tgermana
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by:andyalder
ID: 24399181
You don't need a device driver for the switch, there may be a null driver available to stop Windows picking it up and stop it popping up "found new hardware" on reboot.

Yes, you should install MPIO on the new server.

Do you have two switches in the back of the MSA? Is a cable connected to the new server via both switches?
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by:tgermana
ID: 24399255
Thanks for the info. Yes I do have 2 switches in the back of the MSA and Yes there are 2 cables connected to the server via both switches. Any ideas on the "'failed redundancy path' error. I need to be able to assign a logical drive from the SAN on the new server. thanks.
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by:tgermana
ID: 24399273
Also I forgot to ask about the risk of installing MPIO on the new server. Is there any risk of loosing data from the SAN? thanks,
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by:andyalder
ID: 24399786
Well, if you don't install MPIO you should see the same disk twice which can lead to data corruption if you write to both of them.
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by:tgermana
ID: 24411488
Thanks for the help. But before I can download MPIO I need to resolve the 'failed redundancy path' error described in my previous comments. Any ideas on how can I resolve this issue?
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by:andyalder
ID: 24411647
Do you still get "failed redundancy path" status if you disconnect the new host?

Can you confirm the exact text, there's a couple of threads on ITRC about "redundant path: failed" and "redundancy path: failed" although neither of these are much use since both are still opened with request for show tech_support from the MSA.

Reason I want to eliminate new serer because I think this status is some thing to do with securepath on current server. Can you also run ACU from both new and old servers to compare.
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by:tgermana
ID: 24412047
I actually don't get any error messages on the current server whether the new host is connected or not. But it is interesting now as I can see the san from the new server however it is still showing an enty for 'failed redundancy path' error. I attached a print screen with the error message that I am seeing. Thanks,
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by:andyalder
ID: 24412118
No attachment...
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by:tgermana
ID: 24412370
Ok, for some reason it is not uploading the file, but anyways here is what the screen shot looks like:
-MSA1000
    MSA1000 (Active)
    MSA1000(Failed Redundancy Path)
  -Parallel scsi array A with Spare
    146GB parallel SCSI
    146GB parallel SCSI
    .............................




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andyalder earned 500 total points
ID: 24412563
Sounds like the ACU can only see the MSA through one path, I would disconnect each one in turn and see if it can see it both ways.

If you've only got one host on the SAN at the moment can you also check that Selctive Storage Presentation is on. If it's off do not turn it on with the system live, it's likely it will disconnect the host.

show tech support on the MSA will show all the WWPNs and you can check both of the ones for the new server are listed.
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