How to figure out which drive is degraded?

[KevDog]

I received a notice today about one of the drives in my Zpool being unavailable. What's the proper procedure to address this? I assume SMART testing if possible. Anyway to figure out what drive specifically this refers to in the installation? I have 8 drives. Not exactly sure the exact HD this is.

Code:

freenas% zpool status
  pool: freenas-boot
 state: ONLINE
  scan: scrub repaired 0 in 0 days 00:02:35 with 0 errors on Tue Feb  4 03:47:35 2020
config:

    NAME        STATE     READ WRITE CKSUM
    freenas-boot  ONLINE       0     0     0
      mirror-0  ONLINE       0     0     0
        ada0p2  ONLINE       0     0     0
        ada1p2  ONLINE       0     0     0

errors: No known data errors

  pool: tank
 state: ONLINE
status: One or more devices could not be opened.  Sufficient replicas exist for
    the pool to continue functioning in a degraded state.
action: Attach the missing device and online it using 'zpool online'.
   see: http://illumos.org/msg/ZFS-8000-2Q
  scan: scrub repaired 0 in 0 days 05:08:32 with 0 errors on Sun Feb  2 05:08:35 2020
config:

    NAME                                            STATE     READ WRITE CKSUM
    tank                                            ONLINE       0     0     0
      raidz2-0                                      ONLINE       0     0     0
        gptid/2e48e04a-d2f0-11e6-8e60-0cc47a84a594  ONLINE       0     0     0
        gptid/2eff3431-d2f0-11e6-8e60-0cc47a84a594  ONLINE       0     0     0
        gptid/2fad6079-d2f0-11e6-8e60-0cc47a84a594  ONLINE       0     0     0
        gptid/305f9785-d2f0-11e6-8e60-0cc47a84a594  ONLINE       0     0     0
        gptid/310fd248-d2f0-11e6-8e60-0cc47a84a594  ONLINE       0     0     0
        gptid/31c62952-d2f0-11e6-8e60-0cc47a84a594  ONLINE       0     0     0
        gptid/32845d1c-d2f0-11e6-8e60-0cc47a84a594  ONLINE       0     0     0
        gptid/3338ea10-d2f0-11e6-8e60-0cc47a84a594  ONLINE       0     0     0
    cache
      5095518990214578914                           UNAVAIL      0     0     0  was /dev/gptid/3385f967-d2f0-11e6-8e60-0cc47a84a594
    spares

 

[danb35]

Anyway to figure out what drive specifically this refers to in the installation?

The status output tells you it's your cache device that's dropped out--I assume you know which device that is.

 

[KevDog]

Actually I do

I'm curious -- why isn't the device showing up within camctl:

Code:

<ATA WDC WD60EFRX-68L 0A82>        at scbus0 target 0 lun 0 (pass0,da0)
<ATA WDC WD60EFRX-68L 0A82>        at scbus0 target 1 lun 0 (pass1,da1)
<ATA WDC WD60EFRX-68L 0A82>        at scbus0 target 2 lun 0 (pass2,da2)
<ATA WDC WD60EFRX-68L 0A82>        at scbus0 target 3 lun 0 (pass3,da3)
<ATA WDC WD60EFRX-68L 0A82>        at scbus0 target 4 lun 0 (pass4,da4)
<ATA WDC WD60EFRX-68L 0A82>        at scbus0 target 5 lun 0 (pass5,da5)
<ATA WDC WD60EFRX-68L 0A82>        at scbus0 target 6 lun 0 (pass6,da6)
<ATA WDC WD60EFRX-68L 0A82>        at scbus0 target 7 lun 0 (pass7,da7)
<SATA SSD S9FM02.1>                at scbus1 target 0 lun 0 (pass8,ada0)
<SATA SSD S9FM02.1>                at scbus2 target 0 lun 0 (pass9,ada1)
<AHCI SGPIO Enclosure 2.00 0001>   at scbus7 target 0 lun 0 (pass10,ses0

 

[Jailer]

If its dropped out that usually means its dead and likely the reason it wont show up.

 

[KevDog]

So -- I'm using an SSD drive as a cache -- not sure if this is smart or not -- just my setup. I pulled the cache drive and plugged it into nearby windows10 box. Drive showed right up and SMART status said everything OK. I'm really confused at this point.

 

[Redcoat]

Take a look here https://www.ixsystems.com/community/threads/crucial-mx300-ssd-smart-failure.60805/ - may be helpful?

 

[KevDog]

Thanks for link.
So I reconnected the cache drive back to the main installation and upon reboot -- zpool recognized it. I'm in process of running a long smartctl test on the drive to see results. Thanks for link. I might need help interpreting results.