I setup the ZFS-HA following the excellent description Github (see here). After extensive testing, I rolled the setup out to production using 5x12 disks in RAIDZ3 connected to two nodes using HBA Controllers. This ran quite smooth until last night when one of the two storage pools suddenly faulted with "The pool metadata is corrupted." during a scrub run. At this point I can only speculate about what caused this, both pools were set up with SCSI fencing in pacemaker and disk reservations worked flawlessly during all failure scenarios I tested before going into production. The only major incident which occurred recently were two complete power outages without UPS support (read: the power was just gone from one moment to the next). However, it might also be that the true reason for the corruption is something completely different.

The situation now is that I cannot import the pool anymore (kindly see the output of zpool import at the end of this question). So far, all my intents to rescue the pool failed:

# zpool import -f tank cannot import 'tank': one or more devices is currently unavailable # zpool import -F tank cannot import 'tank': one or more devices is currently unavailable

This puzzles me a bit since it does not really say that the only option would be to destroy the pool (which would be the expected response on a lethally corrupted pool).

# zpool clear -F tank cannot open 'tank': no such pool

I also manually removed all SCSI reservations, e.g.:

# DEVICE=35000c5008472696f # sg_persist --in --no-inquiry --read-reservation --device=/dev/mapper/$DEVICE # sg_persist --in --no-inquiry --read-key --device=/dev/mapper/$DEVICE # sg_persist --out --no-inquiry --register --param-sark=0x80d0001 --device=/dev/mapper/$DEVICE # sg_persist --out --no-inquiry --clear --param-rk=0x80d0001 --device=/dev/mapper/$DEVICE # sg_persist --in --no-inquiry --read-reservation --device=/dev/mapper/$DEVICE

I further tried removing A/C from the disk shelves to clear any temporary information that might remain in the desks.

I am quite frankly running short on options. The only thing left on my list is the -X option to zpool import - which I will try after all other measures failed.

So my question is, did you run into anything like this before and - more importantly - did you find a way to resolve this? I would be very grateful for any suggestions you might have .

=========

Pool layout/configuration:

pool: tank id: 1858269358818362832 state: FAULTED status: The pool metadata is corrupted. action: The pool cannot be imported due to damaged devices or data. The pool may be active on another system, but can be imported using the '-f' flag. see: http://zfsonlinux.org/msg/ZFS-8000-72 config: tank FAULTED corrupted data raidz3-0 FAULTED corrupted data 35000c5008472696f ONLINE 35000c5008472765f ONLINE 35000c500986607bf ONLINE 35000c5008472687f ONLINE 35000c500847272ef ONLINE 35000c50084727ce7 ONLINE 35000c50084729723 ONLINE 35000c500847298cf ONLINE 35000c50084728f6b ONLINE 35000c50084726753 ONLINE 35000c50085dd15bb ONLINE 35000c50084726e87 ONLINE raidz3-1 FAULTED corrupted data 35000c50084a8a163 ONLINE 35000c50084e80807 ONLINE 35000c5008472940f ONLINE 35000c50084a8f373 ONLINE 35000c500847266a3 ONLINE 35000c50084726307 ONLINE 35000c50084726897 ONLINE 35000c5008472908f ONLINE 35000c50084727083 ONLINE 35000c50084727c8b ONLINE 35000c500847284e3 ONLINE 35000c5008472670b ONLINE raidz3-2 FAULTED corrupted data 35000c50084a884eb ONLINE 35000c500847262bb ONLINE 35000c50084eb9f43 ONLINE 35000c50085030a4b ONLINE 35000c50084eb238f ONLINE 35000c50084eb6873 ONLINE 35000c50084728baf ONLINE 35000c50084eb4c83 ONLINE 35000c50084727443 ONLINE 35000c50084a8405b ONLINE 35000c5008472868f ONLINE 35000c50084727c6f ONLINE raidz3-3 FAULTED corrupted data 35000c50084eaa467 ONLINE 35000c50084e7d99b ONLINE 35000c50084eb55e3 ONLINE 35000c500847271d7 ONLINE 35000c50084726cef ONLINE 35000c50084726763 ONLINE 35000c50084727713 ONLINE 35000c50084728127 ONLINE 35000c50084ed0457 ONLINE 35000c50084e5eefb ONLINE 35000c50084ecae2f ONLINE 35000c50085522177 ONLINE raidz3-4 FAULTED corrupted data 35000c500855223c7 ONLINE 35000c50085521a07 ONLINE 35000c50085595dff ONLINE 35000c500855948a3 ONLINE 35000c50084f98757 ONLINE 35000c50084f981eb ONLINE 35000c50084f8b0d7 ONLINE 35000c50084f8d7f7 ONLINE 35000c5008539d9a7 ONLINE 35000c5008552148b ONLINE 35000c50085521457 ONLINE 35000c500855212b3 ONLINE

Edit:

Servers are 2x Dell PowerEdge R630, Controllers are DELL OEM versions of Broardcom SAS HBA (should be similar to SAS 9300-8e) and all 60 disks in this pool are Seagate ST6000NM0034. The Enclosure is Quanta MESOS M4600H.

Edit 2:

OS is CentOS 7

ZFS is zfs-0.7.3-1.el7_4.x86_64