geom_multipath and zfs doesn't work

[Nagy, Attila]

Hi,

On 12/18/14 18:46, Adam McDougall wrote:
> On 12/18/2014 12:04, Nagy, Attila wrote:
>> Running stable/10 at r273159 on FC disks (through isp) I can't create a zfs
>> pool.
>>
>> gstat shows that there is one uncompleted read IO on multipath/sas0 and
>> the queue length constantly grows on da0:
>> # gstat -b
>> dT: 1.030s  w: 1.000s
>>   L(q)  ops/s    r/s   kBps   ms/r    w/s   kBps   ms/w %busy Name
>>   124402    146      0      0    0.0      0      0    0.0 100.5  da0
>> I can use these devices finely with dd.
>>
>> What's going on here?
> I have a hunch.  Try sysctl vfs.zfs.vdev.trim_on_init=0 before zpool create?
>
Bingo, that's it. If I disable this, zpool create returns immediately.

BTW, zpool create took 1 hour and 11 minutes with the default value...

Thank you very much for the quick response!