Replaced HD in Zpool: Lots of disk activity before I issue the replace command

[slaycock]

I'm hoping that this is an occasion where zfs is just getting on with the task rather than waiting for me.

The server is running the current release 10 of NAS4Free.

I had a HD fail in a 10 disk zfs2. No worries, its been running since 2011. I removed the drive with a new, unused drive of the same capacity. On restarting the server there is a lot of disk activity which indicates that the new disk is being re-silvered. However the information page doesn't report that re-silvering is ongoing.

Code: Select all

 pool: LazarusPool
 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://illumos.org/msg/ZFS-8000-2Q
  scan: scrub canceled on Sat Dec 17 05:39:19 2016
config:

	NAME                     STATE     READ WRITE CKSUM
	LazarusPool              DEGRADED     0     0     0
	  raidz2-0               DEGRADED     0     0     0
	    da5                  ONLINE       0     0     0
	    da7                  ONLINE       0     0     0
	    da0                  ONLINE       0     0     0
	    ada0                 ONLINE       0     0     0
	    da1                  ONLINE       0     0     0
	    5517359698052454137  UNAVAIL      0     0     0  was /dev/da2
	    da2                  ONLINE       0     0     0
	    da3                  ONLINE       0     0     0
	    da4                  ONLINE       0     0     0
	    ada1                 ONLINE       0     0     0

errors: No known data errors

Issuing a zpool status command from the console also does not report any re-silvering activity. I get the same report as above.

I'm hoping that something good is happening. But it does seem strange that there are no reports of what the activity is.

The I/O activity of the array is below.

Code: Select all

                            capacity     operations    bandwidth
pool                     alloc   free   read  write   read  write
-----------------------  -----  -----  -----  -----  -----  -----
LazarusPool              5.12T  3.94T    138      4  13.5M  29.1K
  raidz2                 5.12T  3.94T    138      4  13.5M  29.1K
    da5                      -      -    106      0  1.72M  7.52K
    da7                      -      -    106      1  1.72M  7.47K
    da0                      -      -    106      1  1.72M  7.45K
    ada0                     -      -    109      1  1.73M  7.46K
    da1                      -      -    100      1  1.57M  7.57K
    5517359698052454137      -      -      0      0      0      0
    da2                      -      -     95      1  1.53M  7.70K
    da3                      -      -    106      0  1.72M  7.71K
    da4                      -      -    106      0  1.72M  7.60K
    ada1                     -      -    106      0  1.72M  7.59K
-----------------------  -----  -----  -----  -----  -----  -----

Would anyone else be knowledgeable enough to pint me to where else I might be looking to see what is happening.

[erico.bettoni]

You have to issue the command. The pool will not auto replace the drive.

zpool replace LazarusPool /dev/da2

[slaycock]

Thanks. But what is causing the disk activity. Its been going several hours now.

[crowi]

First check what processes are running