Hello Zoltan,
recovering deduped pools after a desaster, even a partial one, has some
drawbacks.
Deduplication information is bound to the storagepool, not the
TSM-instance, so you have to restore the lost data to the same
storagepool. There is no "restore volume", as there are no volumes as
you know it with dedup pools. You lost part of unique data residing in
the pool and that may be affect every single backup object stored in the
pool.
So the only possibility you have is:
1.) Identify the damaged, or lost, containers ("volumes" of the dedup
pool) and mark them damaged or destroyed. Use "audit container" for
this. In your case, as you might have lost some filespaces completely,
"update stgpooldir" might be a faster solution.
2.) add additional space to the container pool as needed. This can be
NFS storage, but be prepared for a massive performace drop.
3.) checkin any offsite tapes of the respective copy container pool
4.) run "restore stgpool"
5.) after completion, run "audit container stgpool=..". During the
audit, you can use the pool for backup and restore. If you run into
errors with restores, wait till the audit completes and perform another
restore stgpool.
6.) Any damaged objects left can be repaired with additional backups or
maybe you can let the objects expire. Damages objects might "heal" by
themself during subsequent client backups into this pool. If the damaged
chunck appears during a client backup, all pointers to that chunck will
be rebound and the damaged original chunck will be expired.
--
Michael Prix
On 5/11/21 9:55 PM, Zoltan Forray wrote:
7.1.7.400 Linux server
We had a multi-disk failure event occur in one of our PowerVaults so an
array is damaged along with lots of volumes.
Tried to do a "restore stgpool" or "restore volume" to other stgpools but
it says you can't do that for deduped pools/volumes.
We have been running movedata all night and it some cases it works or works
for a while and fails making the volume readonly.
We have created an NFS mount to handle recovering what we can from offsite
tapes but can't figure how to do this.
Trying to follow this procedure:
https://www.ibm.com/support/pages/recovering-lost-or-damaged-file-volumes-deduplicated-storage-pool
but have soooo many questions it doesn't seem to answer.
Following the above procedure, I am running AUDIT VOLUME but there are
thousands of volumes to process.
We can't just restore a volume since I am guessing it will try to put it
back into the same stgpool which we don't want to do since this PV is
barely running, haven't got the replacement disks, etc......
So how do I do this?
--
*Zoltan Forray*
VMware Administrator
IBM Spectrum Protect Administrator
Virginia Commonwealth University
UCC/Office of Technology Services
www.ucc.vcu.edu
zfor...@vcu.edu - 804-828-4807
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