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Does a failed P410i cache module battery prevent array rebuild on a Hp DL360 G6

Posted on 2016-07-20
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Last Modified: 2016-09-05
I have relentlessly tried to rebuild the simply RAID 1 array by replacing the drive in bay 2.

The array only has 2 x 146GB drives. Yet, every time I restart the server, the post bios array message states"automatic data recovery (rebuild) previously aborted!"

I hit F1 and all seems ok until shortly after I check the Array configuration utility to find the same message..

ACU Alerts
Could the failed BBWC prohibit my RAID 1 array from rebuilding?

Thanks in advance.

T
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Question by:tobe1424
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11 Comments
 
LVL 1

Expert Comment

by:Keshwarsingh Nadan
ID: 41721142
Yes, a failed BBWC can prevent a rebuilt.

If you don't have a replacement BBWC readily available & would like your array rebuilt, you could unplug the BBWC module.
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Author Comment

by:tobe1424
ID: 41721160
Thanks for the instant feedback.

According to the ACU The battery is disabled if it's low or failed.

Even though this feature is enabled I should still physically unplug the battery?
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Expert Comment

by:Kimputer
ID: 41721184
I've never seen a failed rebuild because of a disabled BBWC module (because the battery's life is ending).
I've always been able to rebuild drives with failed batteries (and not physically disconnecting it).
In your case, it seems more likely bay 2  is defect and no matter what you put it, it's not being detected. Can you confirm this?
To solve this for now, if you have any bays free, put the new disk there and assign it as spare, you'll see that bay 1 will mirror with this spare drive now.
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Expert Comment

by:Keshwarsingh Nadan
ID: 41721199
I had bad experience with DL380 G6 / P410i w 512MB BBWC module.

For some unknown reasons, a rebuilt had always failed whenever a failed BBWC module was detected, especially on this particular server model.

The only remedy was to either replace the BBWC module if a spare was available, or disconnect the module from the p410i & rebuilt was thereafter possible pending a module replacement.

On those models, I'm unsure if you could modify the configuration of an already degraded array for adding a spare as suggested by @Kimputer.
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Accepted Solution

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tobe1424 earned 0 total points
ID: 41721210
Thanks again.

One thing I forgot to mention was that from the Array config utility I set the rebuild priority to high.

Latest details:

I inserted a different drive with the same specs into the same bay and it is now rebuilding - currently by 40%.

I've never gotten this far. so lets see how it goes. If it fails again, I will try to disconnect the battery
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LVL 55

Expert Comment

by:andyalder
ID: 41721221
Please be aware that you should not shut the server down to replace a failed disk, it can cause nasty problems.

The bottom line in the screenshots advises to generate an ADU report to help diagnose the problem. Please do so and upload the zip file here and we'll look through it although chances are very high that it's just a bad disk.

Unfortunately you can't assign a spare while a logical disk is degraded, really annoying quirk of Smart Array controllers, if the slot on the backplane is damaged you can't workaround it :(
1
 

Author Comment

by:tobe1424
ID: 41721781
Well noted andy.

I suppose shutting down can potentially finish ruining the array ?

I ran the ADU report from the ACU, but it just states the same error message.

Anyhow, i added another same spec'd drive and the array rebuilding this time around with no issues. Which is weird because both drive were new. Although not sealed so who knows.
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Expert Comment

by:andyalder
ID: 41721799
Replacing a drive hot with these controllers means it ignores any metadata on them, hot-plugging is really to avoid the controller getting confused if you fit a second hand disk with old data on it.

The ADU report should have a serial log file in it (slotx) which may tell why the drive went offline.
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Author Comment

by:tobe1424
ID: 41721824
turns out the first replacement drive was probably bad also.
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Expert Comment

by:Seth Simmons
ID: 41784424
This question has been classified as abandoned and is closed as part of the Cleanup Program. See the recommendation for more details.
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