8.0-RELEASE: disk IO temporarily hangs up (ZFS or ATA related problem)

Andriy Gapon avg at icyb.net.ua
Fri Dec 18 11:31:11 UTC 2009

on 18/12/2009 12:39 Alexander Zagrebin said the following:
>> I doubt this is the problem, I have WD10EADS disks in my ZFS 
>> array and I 
>> see the same issue.
>> It strikes me as extremely unlikely that both of us would have dud 
>> disks..
>> In any case it seems to be a general problem not limited to 
>> one area of 
>> the disk so a dud sector is an unlikely reason.
> Big thanks for confirmation!
> Your confirmation is important for me.
> There should be a way to define where the bug is: in the ata (or filesystem)
> driver or in the drive's firmware....

Just another 'me too'.
>From the moment I started using zfs and till this day I saw this pattern when
writing lots data to zfs - first high throughput and then idle pause, and so on.
I always thought that this is normal for ZFS (some buffering, grouping, etc).
So I never complained :-)

Andriy Gapon

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