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Data Domain DD880 - Disk showing "Available" ( V ) instead of "Spare" ( S ) after faulty disk replacement
Hi all,
I hope someone can help on that issue.
After a failed disk replacement the new disk comes as Available state instead of Spare state.
Here is an output of the Disk Show State command:
Enclosure Disk
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
--------- ------------------------------------------------
1 s . . .
2 . . . . . . . . s . . . . . s .
3 . . . . . . . . . . . . . . s s
4 . . . . . . . . . . . . . . s s
5 . . . . . . . . . . . . . . s
6 . . . . . . . . . s . . . . . s
7 . . v . . . . . . . . . . . s .
8 . . . . . . . . . . . . . . s s
9 . . . . . . . s . . . . . . .
10 . . . . . . . . . . . . . . s
11 . . . . . . . . . . . . . . s s
12 . . . . . . s . . . . . . . .
13 . . . s . . . . . . . . . . s .
--------- ------------------------------------------------
Legend State Count
------ --------------- -----
. In Use Disks 171
s Spare Disks 20
v Available Disks 1
Total 192 disks
Thanks for your time.
richbinstead
62 Posts
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August 5th, 2016 05:00
Hi Bobby.P,
When you replace a failed disk and the new disk is inserted, the DataDomain system will:
- Examine the newly inserted disk for any partitions that exist.
- If there are no partitions on the disk, then a number of partitions will be created. In one partition, specifically partition 3, will we create a DataDomain superblock. This disk will then become a spare disk as indicated by the 's' state above.
- If partition 3 exists, it is checked for the presence of a superblock. If a superblock exists and the superblock shows the information from another system, the disk will become a foreign or unknown.
- If partition 3 exists but there is no superblock, the disk will become a 'v' available disk.
So the disk you inserted seems to have had partition 3 already created.
The other disk you inserted that immediately became a spare indicates it had no partitions installed upon it.
Therefore as srishenoy mentioned, a disk fail followed by a disk unfail should resolve the 'v' issue and force DataDomain to recreate the partitions and superblock information.
I hope this helps explain why.
cheers, Rich.
Anonymous
5 Practitioner
5 Practitioner
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274.2K Posts
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August 4th, 2016 07:00
If the DD system is low on spares, you should see an alert on the DD indicating this( alerts show current). If yes, then the available disk(7.3) will need to be marked as spare. This will involve a disk fail followed by a disk unfail operation. I would recommend you involve DD support to ensure it is done properly. Hope this helps.
Bobby Petrov
12 Posts
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August 4th, 2016 07:00
Hi Srishenoy,
We did not perform that command.
However we noticed that the faulty drive was with part number 0955287-02 and the replacement drive we used was p/n: 0955287-01.
Could that be the reason the system did not recognized it as a Spare, and would the fail -> unfail command sort it out.
P.S. Worth mentioning is that we now have replaced it with the identical part number (0955287-02) and the disk came up as Spare disk.
Bobby Petrov
12 Posts
0
August 5th, 2016 05:00
Hi Rich,
Will give it a try on the next failed drive and will update you how it went.
Cheers,
Bobby