Hi,

On 05.08.2017 22:08, Eugene M. Zheganin wrote:


  pool: userdata
 state: ONLINE
status: One or more devices has experienced an error resulting in data
        corruption.  Applications may be affected.
action: Restore the file in question if possible.  Otherwise restore the
        entire pool from backup.
   see: http://illumos.org/msg/ZFS-8000-8A
  scan: none requested
config:

        NAME               STATE     READ WRITE CKSUM
        userdata           ONLINE       0     0  216K
          mirror-0         ONLINE       0     0  432K
            gpt/userdata0  ONLINE       0     0  432K
            gpt/userdata1  ONLINE       0     0  432K
That would be funny, if not that sad, but while writing this message, the pool started to look like below (I just asked zpool status twice in a row, comparing to what it was):

[root@san1:~]# zpool status userdata
  pool: userdata
 state: ONLINE
status: One or more devices has experienced an error resulting in data
        corruption.  Applications may be affected.
action: Restore the file in question if possible.  Otherwise restore the
        entire pool from backup.
   see: http://illumos.org/msg/ZFS-8000-8A
  scan: none requested
config:

        NAME               STATE     READ WRITE CKSUM
        userdata           ONLINE       0     0  728K
          mirror-0         ONLINE       0     0 1,42M
            gpt/userdata0  ONLINE       0     0 1,42M
            gpt/userdata1  ONLINE       0     0 1,42M

errors: 4 data errors, use '-v' for a list
[root@san1:~]# zpool status userdata
  pool: userdata
 state: ONLINE
status: One or more devices has experienced an error resulting in data
        corruption.  Applications may be affected.
action: Restore the file in question if possible.  Otherwise restore the
        entire pool from backup.
   see: http://illumos.org/msg/ZFS-8000-8A
  scan: none requested
config:

        NAME               STATE     READ WRITE CKSUM
        userdata           ONLINE       0     0  730K
          mirror-0         ONLINE       0     0 1,43M
            gpt/userdata0  ONLINE       0     0 1,43M
            gpt/userdata1  ONLINE       0     0 1,43M

errors: 4 data errors, use '-v' for a list

So, you see, the error rate is like speed of light. And I'm not sure if the data access rate is that enormous, looks like they are increasing on their own.
So may be someone have an idea on what this really means.

Thanks.
Eugene.
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