zpool - low speed write

[Alex V. Petrov]

> Can you please remove use of the zpool entirely (e.g. zpool destroy
> tank) and do a write test to each disk itself?  E.g.:
> 
> dd if=/dev/zero of=/dev/ad8 bs=64k count=1000000
> dd if=/dev/zero of=/dev/ad10 bs=64k count=1000000
> dd if=/dev/zero of=/dev/ad12 bs=64k count=1000000
> 
> Thanks.

zpool destroy tank

At one time 3 dd

dd if=/dev/zero of=/dev/ad8 bs=64k count=1000000
1000000+0 records in
1000000+0 records out
65536000000 bytes transferred in 605.173955 secs (108292830 bytes/sec)

dd if=/dev/zero of=/dev/ad10 bs=64k count=1000000
1000000+0 records in
1000000+0 records out
65536000000 bytes transferred in 759.946393 secs (86237662 bytes/sec)

dd if=/dev/zero of=/dev/ad12 bs=64k count=1000000
1000000+0 records in
1000000+0 records out
65536000000 bytes transferred in 605.139062 secs (108299074 bytes/sec)



Disks   ad4   ad6   ad8  ad10  ad12   da0   da1
KB/t   0,00 16,00 64,00 64,00 64,00  0,00  0,00
tps       0     1  1667  1329  1646     0     0
MB/s   0,00  0,02   104 83,04   103  0,00  0,00
%busy     0     0    93    94    93     0     0

ie this problem is not the controller

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Alex V. Petrov