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CX500 expansion - adding a new DAE to existing installation

Posted on 2010-08-30
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Hi,

I am having problem connecting a 5th DAE to exisiting CX500. The FLARE code version is 02.24.500.5.011. I have tried to connect this new chassis on BUS0 as well as BUS1, but it just does not gets detected on either BUS.

On this same installtion, I have previously added the 3rd and 4th DAEs without any problem, after power on, once the cables are connected, the DAE shows up in the Navisphere.

But now when I am trying to add this 5th chassis, I am getting a message that the configuration has reached the MAX allowed limit. I think that CX500 should allow the 5th DAE.

Any help/ ideas are much appreciated.

Thanks,

Bill
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Question by:bhunger
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Accepted Solution

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Duncan Meyers earned 2000 total points
ID: 33563312
You're correct: a CX500 will support up to 120 drives or 8 enclosures.

According to emc175163, an array reboot will resolve your issue, one storage processor at a time. To do that with minimal disruption:

- Connect the new disk shelf. Double-check that the enclosure ID is unique on the loop. Also - make sure you balance the loops as best you can. You should have two enclosures on Loop 0 and two on Loop 1 at the moment.
- In Navisphere, put the array into Engineering mode (CTRL-SHIFT F12, password messner)
- Right-click on SPB. You'll see that you have a 'Reboot' option.
- Click on Reboot. Only Storage Processor B will reboot, while Storage Processor A will take up the workload
- Wait. The wait some more. The whole reboot cycle will take about 15 minutes. Be patient. You will see a red F in a circle in Navisphere - this is expected so don't panic.
- Wait until you see a blue T in a circle in Navisphere
- Repeat for SPA
- As your Navisphere connection is handled by SPA, you will see Navisphere drop out (it will show "Unmanaged" and no arrays). Don't panic! Give it 15 minutes and it should come back - click the Refresh button on the browser if it doesn't come back by itself.
- Exit Engineering mode. You can break lots of stuff from here if you're not careful, so don't muck about.

Done!

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Author Comment

by:bhunger
ID: 33629783
Hi, Thanks for the detailed response.

Even though, I have two hbas configured with redundant paths, I still wanted to reboot the storage over the weekend, but I could not get the approval to do it this past weekend.
I am hoping to get the storage rebooted coming weekend and I will let you know of the outcome.

Thanks a bunch.
Bill
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Expert Comment

by:Duncan Meyers
ID: 33632404
The reboot is non-disruptive - you can do one storage processor at a time - if you do it after hours, you'll be fine. Remember that you don't lose connectivity to the storage.
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Author Closing Comment

by:bhunger
ID: 33809076
Thanks meyersd. Finally I managed to get a maintenance window. Did a reboot of both SPs and was able to see the new DAE.

Thanks!!!
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Expert Comment

by:Duncan Meyers
ID: 33812085
Excellent! Glad I could help.
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