[zfs-discuss] Unavailable pool after updating from 0.7.3 to 0.7.4

Miguel Medalha medalist at sapo.pt
Sat Dec 16 19:47:47 EST 2017

I updated zfs 0.7.3 to 0.7.4 on a CentOS 6.9 server. Just did a "yum zfs 
update" and rebooted. My zfs pool didn't mount and it's now unavailable. 
zpool reports:

cannot import 'zpool1': no such pool available

I tried to import it using the /etc/zfs/zpool.cache file. "/zpool import 
-c /etc/zfs/zpool.cache -Fn" gives the following:

    pool: zpool1
      id: 556390836401730730
   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

         zpool1                      UNAVAIL  insufficient replicas
           mirror-0                  UNAVAIL  insufficient replicas
             wwn-0x50014ee25a7c6a19  UNAVAIL
             wwn-0x50014ee2aff517bc  UNAVAIL

"zdb -U /etc/zfs/zpool.cache" outputs the following:

     version: 5000
     name: 'zpool1'
     state: 0
     txg: 4
     pool_guid: 556390836401730730
     errata: 0
     hostname: 'pombal'
     vdev_children: 1
         type: 'root'
         id: 0
         guid: 556390836401730730
         create_txg: 4
             type: 'mirror'
             id: 0
             guid: 4706384182298630342
             metaslab_array: 256
             metaslab_shift: 31
             ashift: 12
             asize: 250045005824
             is_log: 0
             create_txg: 4
             com.delphix:vdev_zap_top: 129
                 type: 'disk'
                 id: 0
                 guid: 16730838872300733673
                 path: '/dev/disk/by-id/wwn-0x50014ee25a7c6a19-part1'
                 devid: 'ata-WDC_WD2500BEKT-66F3T2_WD-WX81AA017812-part1'
                 phys_path: 'pci-0000:00:1f.2-scsi-1:0:0:0'
                 whole_disk: 1
                 create_txg: 4
                 com.delphix:vdev_zap_leaf: 130
                 type: 'disk'
                 id: 1
                 guid: 5440135513295625149
                 path: '/dev/disk/by-id/wwn-0x50014ee2aff517bc-part1'
                 devid: 'ata-WDC_WD2500BEKT-00A25T0_WD-WXE1AB0H9466-part1'
                 phys_path: 'pci-0000:00:1f.2-scsi-0:0:0:0'
                 whole_disk: 1
                 create_txg: 4
                 com.delphix:vdev_zap_leaf: 131

I used the data on the pool just prior to the update and zpool then saw 
the pool as healthy.
I am stuck now. I have about 150GB of data on that pool. Not all data 
has a backup. Any ideas?

Thank you!

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