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01-21-2012 11:36 AM
01-21-2012 11:36 AM
EVA8000 Cache battery failure
Hi Experts,
We have an EVA8000 with XCS6.11 firmware. Today both batteries of Controller A failed. But still the Controller was showing status as Operational State in Command View EVA and from one of the hp-unix host I checked the h/w path for the disks and all the 8 paths were showing as claimed.
I want to make sure what will be the impact to the cache in this condition? Is really both Controllers are functional now? I was thinking that, if both cache batteries fails on a controller, that controller will be in a failed state (because cache is disabled) and the ownership of virtual disks will be transfered to the other Controller.
I woud like to get your opinion on this.
Thanks in advance ..
Pramod M
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01-21-2012 11:03 PM
01-21-2012 11:03 PM
Re: EVA8000 Cache battery failure
Hey,
XCS 6.24 has improvements to the batteries, especially for the EVA8k.
Yes, if both batteries in a controller dies, that controller should not present any LUNs.
So either they aren't broken or they're in some weird middle state.
Maybe the controller event log can tell you more?
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01-22-2012 02:14 AM
01-22-2012 02:14 AM
Re: EVA8000 Cache battery failure
Hi Johan,
one more query..
>>Yes, if both batteries in a controller dies, that controller should not present any LUNs
If this is the condition then from the host while we scan disks it should show NO_HW for the disabled cache controller paths, isn't it? But I am getting all the 8 paths as claimed.
Regards,
Pramod
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01-22-2012 02:45 AM
01-22-2012 02:45 AM
Re: EVA8000 Cache battery failure
I don't know about the output of your commands.
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01-22-2012 10:00 PM
01-22-2012 10:00 PM
Re: EVA8000 Cache battery failure
But the controller doesn't stop presenting the LUN, but most likely it has disabled the write cache.
Replace the batteries ASAP!
Hope this helps!
Regards
Torsten.
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01-26-2012 05:01 AM
01-26-2012 05:01 AM
Re: EVA8000 Cache battery failure
I also have some doubt aboute this.
But AFAIK, the controller will "stop", and failover all LUN's to the other controller.
The following I do know.
The controller is not shut down, and the path do stay up.
Also, when all batteries on both controllers has failed, the EVA will stop.
So agree with Torsten, get the batteries replaced asap.
br
/jag
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01-31-2012 07:58 AM
01-31-2012 07:58 AM
Re: EVA8000 Cache battery failure
Link below serves an advisory explaining battery replacement procedures for repeated failure.
Also,
For instant step-by-step solutions you can check HP guided troubleshooting tree on the below link and follow the steps for troubleshooting>>HSV Controller related issues>>Cache battery related issue and select your issue scenerio.
Regards,
Prakash
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