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Date: Wed, 8 Jul 2009 11:53:17 +1000
From: Emil Mikulic <emikulic@gmail.com>
To: Brooks Davis <brooks@freebsd.org>
Message-ID: <20090708015317.GA47872@dmr.ath.cx>
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Cc: freebsd-stable@freebsd.org
Subject: Re: ZFS: drive replacement performance
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On Tue, Jul 07, 2009 at 03:53:58PM -0500, Brooks Davis wrote:
> I'm seeing essentially the same think on an 8.0-BETA1 box with an 8-disk
> raidz1 pool.  Every once in a while the system makes it to 0.05% done
> and gives a vaguely reasonable rebuild time, but it quickly drops back
> to reports 0.00% and it's basically not making any forward progress.

You're not creating or deleting snapshots, are you?
AFAICT doing that will make scrub (and resilver) start from scratch.

--Emil