My ZFS pool called data do not mount anymore after a shutdown. Maybe there was some automatic update on the computer. I Don't know.
zpool status returns
no pools available
zpool import returns something strange to me
pool: data
id: 14112227688943668786
state: ONLINE
status: The pool is formatted using a legacy on-disk version.
action: The pool can be imported using its name or numeric identifier, though
some features will not be available without an explicit 'zpool upgrade'.
config:
data ONLINE
raidz3-0 ONLINE
ata-WDC_WD30EFRX-68EUZN0_WD-WMC4N0543911 ONLINE
ata-WDC_WD30EFRX-68EUZN0_WD-WMC4N0541901 ONLINE
ata-WDC_WD30EFRX-68EUZN0_WD-WMC4N0534846 ONLINE
ata-WDC_WD30EFRX-68EUZN0_WD-WMC4N0559408 ONLINE
ata-WDC_WD30EFRX-68EUZN0_WD-WMC4N0497883 ONLINE
ata-WDC_WD30EFRX-68EUZN0_WD-WMC4N0560576 ONLINE
ata-WDC_WD30EFRX-68EUZN0_WD-WMC4N0535023 ONLINE
ata-WDC_WD30EFRX-68EUZN0_WD-WMC4N0534837 ONLINE
ata-WDC_WD30EFRX-68EUZN0_WD-WMC4N0534911 ONLINE
ata-WDC_WD30EFRX-68EUZN0_WD-WCC4N0074989 ONLINE
ata-WDC_WD30EFRX-68EUZN0_WD-WMC4N0531032 ONLINE
ata-WDC_WD30EFRX-68EUZN0_WD-WMC4N0543358 ONLINE
ata-WDC_WD30EFRX-68EUZN0_WD-WMC4N0589256 ONLINE
ata-WDC_WD30EFRX-68EUZN0_WD-WMC4N0560327 ONLINE
ata-WDC_WD30EFRX-68EUZN0_WD-WMC4N0547220 ONLINE
pool: data
id: 17000803019094542855
state: UNAVAIL
status: One or more devices contains corrupted data.
action: The pool cannot be imported due to damaged devices or data.
see: http://zfsonlinux.org/msg/ZFS-8000-5E
config:
data UNAVAIL insufficient replicas
raidz3-0 UNAVAIL insufficient replicas
scsi-SATA_WDC_WD30EFRX-68_WD-WMC4N0535023 UNAVAIL
scsi-SATA_WDC_WD30EFRX-68_WD-WMC4N0560483 ONLINE
scsi-SATA_WDC_WD30EFRX-68_WD-WMC4N0558445 ONLINE
scsi-SATA_WDC_WD30EFRX-68_WD-WCC4N0071139 ONLINE
scsi-SATA_WDC_WD30EFRX-68_WD-WCC4N0074989 UNAVAIL
scsi-SATA_WDC_WD30EFRX-68_WD-WMC4N0592680 ONLINE
scsi-SATA_WDC_WD30EFRX-68_WD-WMC4N0497883 UNAVAIL
scsi-SATA_WDC_WD30EFRX-68_WD-WMC4N0541732 ONLINE
scsi-SATA_WDC_WD30EFRX-68_WD-WMC4N0589971 ONLINE
scsi-SATA_WDC_WD30EFRX-68_WD-WMC4N0559406 ONLINE
scsi-SATA_WDC_WD30EFRX-68_WD-WMC4N0559408 UNAVAIL
scsi-SATA_WDC_WD30EFRX-68_WD-WMC4N0592326 ONLINE
scsi-SATA_WDC_WD30EFRX-68_WD-WMC4N0560660 ONLINE
scsi-SATA_WDC_WD30EFRX-68_WD-WMC4N0589256 UNAVAIL
scsi-SATA_WDC_WD30EFRX-68_WD-WMC4N0535000 ONLINE
That is: two pools called data:
- one with id 14112227688943668786. state: ONLINE. I will call it data_unwanted below.
- one with id 17000803019094542855. state: UNAVAIL. I will call it data_wanted below.
data_unwanted is a reminiscence of a test I did a long time ago. I think I destroyed the pool after my tests. Then I created data_wanted and enjoyed it for 2 years without any problem. Note that I rebooted a few times to update the system during these 2 years without any problem.
I have two other pools of 15 drives each that got their names "duplicated" in the same way.
I noticed that the hard drives that are UNVAILABLE in data_wanted are those that are "common" with data_unwanted or one of the other two newly appeared _unwanted pools. For example, scsi-SATA_WDC_WD30EFRX-68_WD-WCC4N0074989 is UNAVAIL in data_wanted while it appears ONLINE with name ata-SATA_WDC_WD30EFRX-68_WD-WCC4N0074989 in data_unwanted.
For some reason, it seems that data_unwanted and two friends popped-up back from past at reboot, with priority over data_wanted, and as it uses some of the drives needed by data_wanted, it makes data_wanted UNAVAIL.
I can't find a solution to this. The data is important, I thought everything was safe with the raidz3 level, good RAM, power redundancy, but ...
Oh, and uname -a reports:
Linux backupmachine 3.13.0-53-generic #89~precise1-Ubuntu SMP Wed May 20 17:42:16 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
That's Ubuntu 12.04.5 LTS.
