Date: Tue, 20 Jan 2009 19:29:14 +0100 (CET) From: Oliver Fromme <olli@lurza.secnetix.de> To: freebsd-current@FreeBSD.ORG, josh.carroll@gmail.com Subject: Re: SATA DMA errors on second ICH10 bus Message-ID: <200901201829.n0KITE8V072323@lurza.secnetix.de> In-Reply-To: <8cb6106e0901200641x4b0bda9ag31e6f059f13035a7@mail.gmail.com>
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Josh Carroll wrote:
> I've got 2 WD black drives on order to replace these two ST31000340AS,
> and originally my intention was to use them for separate filesystems,
> but I think I'll gmirror them now, to be safe(er).
Some people recommend to use different vendors for the
components of disk mirrors, in order to reduce the
likelihood that both drives will fail at about the same
time due to a firmware bug or similar.
That advice seems to be particularly valuable given the
current firmware problems that particular Seagate disks
are exhibiting.
For example, I've got these in a server:
# atacontrol list | grep ad
Master: ad0 <SAMSUNG HD160JJ/WU100-41> Serial ATA II
Master: ad1 <ST3160811AS/3.AAE> Serial ATA v1.0
# diskinfo ad0 ad1
ad0 512 160041885696 312581808 310101 16 63
ad1 512 160041885696 312581808 310101 16 63
# gmirror status
Name Status Components
mirror/gm0 COMPLETE ad0
ad1
Best regards
Oliver
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