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Date:      Sun, 3 Oct 2010 11:03:38 +0200
From:      Alexander Leidinger <Alexander@Leidinger.net>
To:        Steve Polyack <korvus@comcast.net>
Cc:        mav@FreeBSD.org, freebsd-stable <freebsd-stable@freebsd.org>, Dan Langille <dan@langille.org>, Jeremy Chadwick <freebsd@jdc.parodius.com>
Subject:   Re: out of HDD space - zfs degraded
Message-ID:  <20101003110338.00004197@unknown>
In-Reply-To: <4CA7E98E.3040701@comcast.net>
References:  <4CA73702.5080203@langille.org> <20101002141921.GC70283@icarus.home.lan> <4CA7AD95.9040703@langille.org> <20101002223626.GB78136@icarus.home.lan> <4CA7BEE4.9050201@langille.org> <20101002235024.GA80643@icarus.home.lan> <4CA7E4AE.4060607@langille.org> <4CA7E98E.3040701@comcast.net>

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On Sat, 02 Oct 2010 22:25:18 -0400 Steve Polyack <korvus@comcast.net>
wrote:

> I thin its worth it to think about TLER (or the absence of it) here - 
> http://en.wikipedia.org/wiki/Time-Limited_Error_Recovery .  Your 
> consumer / SATA Hitachi drives likely do not put a limit on the time
> the drive may block on a command while handling inernal errors.  If
> we consider that gpt/gisk06-live encountered some kind of error and
> had to relocate a significant number of blocks or perform some other
> error recovery, then it very well may have timed out long enough for
> siis(4) to drop the device.  I have no idea what the timeouts are set
> to in the siis(4) driver, nor does anything in your SMART report
> stick out to me (though I'm certainly no expert with SMART data, and
> my understanding is that many drive manufacturers report the various
> parameters in different ways).

IIRC mav@ (CCed) made a commit regarding this to -current in the not so
distant past. I do not know about the MFC status of this, or if it may
have helped or not in this situation.

Bye,
Alexander.



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