Orphan disks

Gmox — Thu, 14 Nov 2024 13:42:53 GMT

Hello all,

I'm performing some test in my lab storage.

I wanted to create "orphan" disks and try to found a way to recover the fail aggregate.

I have been able to got orphaned disk but don't found how to recover.

If someone has a lead or any clue, it will be much appreciate.

Aggregate aggr_test_orphan (failed, raid_dp, partial) (block checksums)
Plex /aggr_test_orphan/plex0 (offline, failed, inactive)
RAID group /aggr_test_orphan/plex0/rg0 (partial, block checksums)

RAID Disk Device HA SHELF BAY CHAN Pool Type RPM Used (MB/blks) Phys (MB/blks)
--------- ------ ------------- ---- ---- ---- ----- -------------- --------------
dparity FAILED N/A 560000/ -
parity 4a.125L57 4a 11 4 FC:B 0 SAS 15000 560000/1146880000 560879/1148681096
data FAILED N/A 560000/ -
data 4a.125L60 4a 11 7 FC:B 0 SAS 15000 560000/1146880000 560879/1148681096
data FAILED N/A 560000/ -
data 4a.125L63 4a 11 10 FC:B 0 SAS 15000 560000/1146880000 560879/1148681096
data 4a.125L64 4a 11 11 FC:B 0 SAS 15000 560000/1146880000 560879/1148681096
data 4a.125L53 4a 11 0 FC:B 0 SAS 15000 560000/1146880000 560879/1148681096
Raid group is missing 3 disks.

Unassimilated aggr_test_orphan disks

RAID Disk Device HA SHELF BAY CHAN Pool Type RPM Used (MB/blks) Phys (MB/blks)
--------- ------ ------------- ---- ---- ---- ----- -------------- --------------
orphaned 4a.125L62 4a 11 9 FC:B 0 SAS 15000 560000/1146880000 560879/1148681096

NetApp Release 8.2.5P5 7-Mode

Thank you

Re: Orphan disks

AlexDawson — Mon, 25 Nov 2024 03:08:41 GMT

One three disks have failed, the data is gone. The only way to recover the aggregate is to bring the last failed disk back online. For 7 mode, you need to remove it from the failed-disk-register and try to reread the aggregate. raid_config info showfdr is probably the starting point for 7 mode in a lab context, but if you actually care about the data, please contact an enterprise data recovery company like Kroll ONTRACK or Drivesavers.

Re: Orphan disks

Gmox — Wed, 18 Dec 2024 14:11:14 GMT

Hello Alex, sorry for my late reply.

It was a test so no important data.

It was on purpose to have orphan disk and try to recover the aggregate with this "out of synchro" disk.

Thank you anyway.

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