resilvering takes ages on 8.2 (amd64 from 18.04.2011)

[Holger Kipp]

Resilvering a disk in raidz2 ZFS is taking ages. Any ideas? I had replaced a different disk this morning (da7) and it took only about 1 hour alltogether. Any ideas? Or did I do something very wrong (tm)?

Best regards,
Holger

--------------------

 8.2-STABLE FreeBSD 8.2-STABLE #12: Mon Apr 18 12:48:56 CEST 2011

# zpool status
  pool: tank
 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.
 scrub: resilver in progress for 0h21m, 1.10% done, 32h19m to go
config:

        NAME           STATE     READ WRITE CKSUM
        tank           DEGRADED     0     0     0
          raidz2       DEGRADED     0     0     0
            replacing  DEGRADED     0     0     0
              da0/old  OFFLINE      0     0     0
              da0      ONLINE       0     0     0  158M resilvered
            da1        ONLINE       0     0     0
            da2        ONLINE       0     0     0
            da7        ONLINE       0     0     0
            da3        ONLINE       0     0     0
            da4        ONLINE       0     0     0
            da5        ONLINE       0     0     0
            da6        ONLINE       0     0     0

errors: No known data errors



-----------------
    1 users    Load  0.00  0.00  0.00                  May  6 14:37

Mem:KB    REAL            VIRTUAL                       VN PAGER   SWAP PAGER
        Tot   Share      Tot    Share    Free           in   out     in   out
Act  119320   18980  1362144    25756 7648824  count
All  344920   23296 1075218k    57012          pages
Proc:                                                            Interrupts
  r   p   d   s   w   Csw  Trp  Sys  Int  Sof  Flt        cow    4765 total
             76      9171   11  130  766  952             zfod        atkbd0 1
                                                          ozfod       ata0 irq14
 0.7%Sys   0.3%Intr  0.0%User  0.0%Nice 99.0%Idle        %ozfod     1 uhci0 16
|    |    |    |    |    |    |    |    |    |    |       daefr       uhci1 17
                                                          prcfr     1 twe0 irq24
                                         7 dtbuf     1106 totfr  1999 cpu0: time
Namei     Name-cache   Dir-cache    206492 desvn          react   763 isp0 256
   Calls    hits   %    hits   %      3598 numvn          pdwak     2 em0 irq257
      12      11  92                  1382 frevn          pdpgs  1999 cpu1: time
                                                          intrn
Disks   da0   da1   da2   da3   da4   da5   da6    328004 wire
KB/t   0.67  4.92  4.68  4.46  4.53  4.66  4.91     84728 act
tps     151   138   150   151   146   149   140     39788 inact
MB/s   0.10  0.66  0.69  0.66  0.65  0.68  0.67      1520 cache
%busy   101    41    44    42    41    40    39   7647296 free
                                                    60464 buf


--


Holger Kipp
Diplom-Mathematiker
Senior Consultant


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