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Date:      Thu, 09 Feb 2012 13:37:03 -0500
From:      Mike Tancsa <mike@sentex.net>
To:        Jeremy Chadwick <freebsd@jdc.parodius.com>
Cc:        Alexander Motin <mav@FreeBSD.org>, freebsd-stable@FreeBSD.org
Subject:   Re: siisch1: Error while READ LOG EXT
Message-ID:  <4F34124F.9090808@sentex.net>
In-Reply-To: <20120209163415.GA96451@icarus.home.lan>
References:  <4F32E289.4080806@sentex.net> <mailpost.1328736521.3202974.81071.mailing.freebsd.stable@FreeBSD.cs.nctu.edu.tw> <4F32F5B0.2060203@FreeBSD.org> <20120208223819.GA27488@icarus.home.lan> <4F32FB5E.7050102@FreeBSD.org> <4F33DB75.1080202@sentex.net> <20120209152240.GA95470@icarus.home.lan> <4F33F056.6070300@sentex.net> <20120209163415.GA96451@icarus.home.lan>

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On 2/9/2012 11:34 AM, Jeremy Chadwick wrote:
> 
> You will probably need to "track these drives" on a regular basis.  That
> is to say, set up some cronjob or similar that logs the above output to
> a file (appends data to it), specifically output from smartctl -A (not
> -a and not -x) and smartctl -l sataphy on a per-disk basis.  smartd can
> track SMART attribute changes, but does not track GPLog changes.  Make
> sure to put timestamps in your logs.

Thanks very much for having a look, and the suggestions. It think this
is the way to go to see which drive my have errors incrementing.
Alexander, is there a better way you can suggest ?

> 
> As for fixing the problem: I have no idea how you would go about this.
> Use of port multipliers involves additional cables, possibly of shoddy
> quality, or other components which may not be decent/reliable.  


Possibly.  Cables are one of those things I am happy to "pay extra for
better quality" but how does one assess quality of such parts.

> 
> Overall, this is just one of the many reasons why I avoid PMs, as well
> as avoid eSATA (especially eSATA).  

Yeah, at some point it doesnt really work with too many PMs, especially
if you cant query the thing to find out where things are "bad".  I think
for the next version of this box I will use the newer generation 3ware
SAS/SATA controller

	---Mike



-- 
-------------------
Mike Tancsa, tel +1 519 651 3400
Sentex Communications, mike@sentex.net
Providing Internet services since 1994 www.sentex.net
Cambridge, Ontario Canada   http://www.tancsa.com/



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