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Date:      Sat, 20 Aug 2011 14:17:37 -0400
From:      Dan Langille <dan@langille.org>
To:        Diane Bruce <db@db.net>
Cc:        freebsd-stable@freebsd.org, Jeremy Chadwick <freebsd@jdc.parodius.com>
Subject:   Re: bad sector in gmirror HDD
Message-ID:  <D383C94D-D7AD-4A6C-ACAD-ACB58ACA4E1E@langille.org>
In-Reply-To: <20110820180415.GA74553@night.db.net>
References:  <1B4FC0D8-60E6-49DA-BC52-688052C4DA51@langille.org> <20110819232125.GA4965@icarus.home.lan> <B6B0AD0F-A74C-4F2C-88B0-101443D7831A@langille.org> <20110820032438.GA21925@icarus.home.lan> <4774BC00-F32B-4BF4-A955-3728F885CAA1@langille.org> <20110820180415.GA74553@night.db.net>

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On Aug 20, 2011, at 2:04 PM, Diane Bruce wrote:

> On Sat, Aug 20, 2011 at 01:34:41PM -0400, Dan Langille wrote:
>> On Aug 19, 2011, at 11:24 PM, Jeremy Chadwick wrote:
>>=20
>>> On Fri, Aug 19, 2011 at 09:39:17PM -0400, Dan Langille wrote:
> ...
>>>> Information such as this?  =
http://beta.freebsddiary.org/smart-fixing-bad-sector.php
> ...
>>> 3) A very high temperature of 51C (SMART attribute 194).  If this =
drive
>>> is in an enclosure or in a system with no fans this would be
>=20
> ...
>=20
> eh? What's the temperature of the second drive?

Roughly the same:


[root@bast:/home/dan/tmp] # smartctl -a /dev/ad2 | grep -i temp
194 Temperature_Celsius     0x0022   080   076   042    Old_age   Always =
      -       51

[root@bast:/home/dan/tmp] # smartctl -a /dev/ad0 | grep -i temp
194 Temperature_Celsius     0x0022   081   074   042    Old_age   Always =
      -       49
[root@bast:/home/dan/tmp] #=20


FYI, when I first set up smartd, I questioned those values.  The HDD in =
question, at the time,
did not feel hot to the touch.

>=20
> ...
>=20
>> This is an older system.  I suspect insufficient ventilation.  I'll =
look at getting
>> a new case fan, if not some HDD fans.
>=20
> ...
>=20
>>> I still suggest you replace the drive, although given its age I =
doubt
>=20
> Older drive and errors starting to happen, replace ASAP.
>=20
>>> you'll be able to find a suitable replacement.  I tend to keep disks
>>> like this around for testing/experimental purposes and not for =
actual
>>> use.
>>=20
>> I have several unused 80GB HDD I can place into this system.  I think =
that's
>> what I'll wind up doing.  But I'd like to follow this process through =
and get it documented
>> for future reference.
>=20
> If the data is valuable, the sooner the better.=20
> It's actually somewhat saner if the two drives are not from the same =
lot.

Noted.

--=20
Dan Langille - http://langille.org




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