Netgear – Rebuild raid-set of a ReadyData 5200

Recently a customer had to replace a disk in the ReadyData 5200. How ever the disk came online but wasn’t available for rebuilding of the raid array. I needed to contact L3 support for further help. The fix they supplied was easier than I thought, I followed the commands which the engineer used.

You need to logon to the ReadyData device with SSH, use the user root and the current admin password to login.
When you are logged in you see the following:

Last login: Tue Sep 20 15:01:26 2016 from computername.lan.local.
root@readydata:~#

To see the current status of the volume you need to use the following command:

root@readydata:~# zpool status
  pool: VOLUME01
 state: DEGRADED
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://www.sun.com/msg/ZFS-8000-2Q
 scan: scrub canceled on Tue Oct 11 09:09:36 2016
config:

        NAME                       STATE     READ WRITE CKSUM
        VOLUME01                   DEGRADED     0     0     0
          raidz1-0                 DEGRADED     0     0     0
            c0t5000C5004D0B838Bd0  ONLINE       0     0     0
            c0t5000C50079ECD105d0  ONLINE       0     0     0
            c0t5000C50079B4212Bd0  ONLINE       0     0     0
            c0t5000C50079DBDC1Cd0  ONLINE       0     0     0
            1002758886951245814    UNAVAIL      0     0     0  was /dev/dsk/c0t5000C50079DDBB70d0s0
            c0t5000C50079EC938Ad0  ONLINE       0     0     0

errors: No known data errors

  pool: rpool
 state: ONLINE
 scan: resilvered 275M in 0h0m with 0 errors on Thu Apr 30 15:39:10 2015
config:

        NAME                           STATE     READ WRITE CKSUM
        rpool                          ONLINE       0     0     0
          /VOLUME01/._system/VOLUME01  ONLINE       0     0     0

errors: No known data errors

The next step is that you find out what the drive information is which is unavailable for rebuilding. You can do this with the following command:

root@readydata:~# get_disk_info -h
Device:             c0t5000C5007A9BBB38d0
Channel:            4
Controller:         0
Model:              ST3000NM0033-9ZM
Serial:             Z1Z80QGD
Firmware:           SN04
Class:              SATA
RPM:                7200
Sector size:        512
Sectors:            5860533168
Pool:
PoolType:
PoolState:          0
PoolHostId:         0
ATA Error Count:    0
SMART Data:
  Reallocated Sectors:            0
  Spin Retry Count:               0
  End-to-End Errors:              0
  Command Timeouts:               0
  Current Pending Sector Count:   0
  Uncorrectable Sector Count:     0
  Temperature:                    29
  Start/Stop Count:               2
  Power-On Hours:                 448
  Power Cycle Count:              2
  Load Cycle Count:               20

Find the disk you need, you can see that the disk you need isn’t assigned to a pool.
To add the disk to the raid set for rebuilding you need to use the following command.

root@Readydata:~# zpool replace VOLUME01 <pool number (disk unavailable)> <device number>

When you did this you can check the status of the pool and also see that the raid set is starting to rebuild.

Youroot@Readydata:~# zpool status
  pool: VOLUME01
 state: DEGRADED
status: One or more devices is currently being resilvered.  The pool will
        continue to function, possibly in a degraded state.
action: Wait for the resilver to complete.
 scan: resilver in progress since Tue Oct 11 10:25:38 2016
    90.4M scanned out of 13.2T at 2.66M/s, 1444h26m to go
    15.0M resilvered, 0.00% done
config:

        NAME                         STATE     READ WRITE CKSUM
        VOLUME01                     DEGRADED     0     0     0
          raidz1-0                   DEGRADED     0     0     0
            c0t5000C5004D0B838Bd0    ONLINE       0     0     0
            c0t5000C50079ECD105d0    ONLINE       0     0     0
            c0t5000C50079B4212Bd0    ONLINE       0     0     0
            c0t5000C50079DBDC1Cd0    ONLINE       0     0     0
            replacing-4              UNAVAIL      0     0     0
              1002758886951245814    UNAVAIL      0     0     0  was /dev/dsk/c0t5000C50079DDBB70d0s0
              c0t5000C5007A9BBB38d0  ONLINE       0     0     0  (resilvering)
            c0t5000C50079EC938Ad0    ONLINE       0     0     0

errors: No known data errors

  pool: rpool
 state: ONLINE
 scan: resilvered 275M in 0h0m with 0 errors on Thu Apr 30 15:39:10 2015
config:

        NAME                           STATE     READ WRITE CKSUM
        rpool                          ONLINE       0     0     0
          /VOLUME01/._system/VOLUME01  ONLINE       0     0     0

errors: No known data errors

Now yo can see in the dashboard of the Readydata (Webpage) that it started to rebuild on the command line you can see how long this will take.

readydataresync

 

This can take a while. If you are not sure about what you doing contact the support of the vendor.

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