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Date: Wed, 26 Nov 2008 06:50:31 -0600 (CST)
From: Wes Morgan <morganw@chemikals.org>
To: Andriy Gapon <avg@icyb.net.ua>
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Cc: freebsd-fs@freebsd.org
Subject: Re: endless zpool scrub?
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On Wed, 26 Nov 2008, Andriy Gapon wrote:

> on 26/11/2008 13:24 Goran Lowkrantz said the following:
>> Do you have a script or something that creates snapshots running?
>>
>> I used sysutils/zfs-snapshot-mgmt and did see the same as you, as a
>> running scrub is reset by a snapshot creation.
>
> Yes, I've just realized I had recently enabled zfs-snapshot-mgmt on this
> machine. And the time when scrub is "disrupted" is the time when
> snapshots are taken. Thank you!
>
>> If you are using this script, we have tested a modified version that
>> suspends snapshot creation on a pool that is scrubbing.
>
> I would be very grateful for the patch!
>
>

Just FYI, once Pawel merges the recent ZFS patches to -stable (please 
don't ask when, though!), snapshotting will not interfere with a scrub.