raid says ready to rebuild. not rebuilding

Gnoel
Gnoel used Ask the Experts™
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776 (Ready for Recovery) Logical Drive 1 (1.4 TB, RAID 5) is queued for rebuilding. hp server g5 ml350 server has been in this state for 2 weeks server has been restarted still says ready to rebuild not sure where to look next thanks
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Dr. KlahnPrincipal Software Engineer

Commented:
a) What's in the controller log?

b) Is the replacement drive a genuine HP branded drive, of a model identical to the other drives bound in this RAID set?

Author

Commented:
yes it was hp branded drive, i will attach acu log
report-eaf0b2b1-00003d20-00000000.zip
Dr. KlahnPrincipal Software Engineer

Commented:
a) What controller model is this?

b) Have you attempted a manual rebuild using the controller BIOS extension at initial boot?
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Top Expert 2014

Commented:
It tried to rebuild but aborted due to bad blocks on disk 1. You will find this in the report.

"Rebuild Aborted From Read Error Critical"

You can try reseating it so it starts again but it will probably fail again.

Search the log for "read errors hard" before and after replacing/reseating the disk, If the count goes up during the rebuild that proves it. There are two instances of drive stats per disk, the "since reset" are the more useful. Disk 1 has many errors, disk 2 has a few as well. Disk 3 (the replacement) usn't that healthy either.

There is later controller firmware that will skip over bad blocks to give a partial rebuild but that leaves you with a hole in the data. Best thing to do is backup, replace all 3 disks, build a new array and restore.

Author

Commented:
ok update to my issue. there ARE 3 DRIVES RAID 5. I think they are drive 0 1 and 2 in the ACU. Drive 1 has been trying to rebuild, keeps saying ready for recovery. So I purchased 2 additional drives just to make sure the drives are good. I inserted one drive its start to rebuild then reverts to ready for rebuild, the same happens again with an entirely different drive. Thought's where do i go now to get this drive rebuilt. Thanks
Top Expert 2014

Commented:
Post another ADU report after replacing the diskand I will verify whether backup/rebuild/restore is the only option or not.

Author

Commented:
For Andyalder. attached is current acu report log. Thank You
ACU-report-eaf0b2b1-00003d20-0000000.zip
Top Expert 2014
Commented:
Here are the "read errors hard" stats from your disks, oldest stats first.

1I:1:1 9QJ1BJKT 0x0000003c
1I:1:2 JPW9K0N0039RNL 0x00000000
1I:1:3  WCAW36553257  0x00000000

1I:1:1 9QJ1BJKT 0x00000560 0x000005b3  <---increasing
1I:1:2 JPW9K0N003P9DL 0x00000000 <----changed
1I:1:3  WCAW36553257  0x00000000

So you are replacing 1I:1:2 with a good disk but it cannot rebuild with all those bad sectors on disk 1I:1:1 . The 0x3c and 0x5b3 do not mean you have that many bad blocks but it means you encountered the same bad blocks repeatedly as the controller tries to recover the data a few times before giving up.

It will never rebuild, you have to back up, create a new array and restore. Oh, and throw 9QJ1BJKT in the bin.

You'll note in the stats that 9QJ1BJKT does not say predictive failure, that's because Seagate didn't count media defects as being failures. It will fail diagnostics though as HP disk diags do take into account the bit error rate.

Before you build your new array put all your disks in the server, get an ADU report via SmartStart CD plus USB stick and make sure there are no hard read errors on any of them. In this instance use the "from factory" stats since it won't have any figures for the "since reset".

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