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Date:      Thu, 3 Jul 2008 20:52:25 -0400
From:      "Zaphod Beeblebrox" <zbeeble@gmail.com>
To:        "Daniel Eriksson" <daniel_k_eriksson@telia.com>
Cc:        legioner.r@gmail.com, morten@lightworkings.dk, freebsd-stable@freebsd.org, sos@freebsd.org
Subject:   Re: MCP55 SATA data corruption in FreeBSD 7
Message-ID:  <5f67a8c40807031752r22c3391ds23ab57cb59d2cd32@mail.gmail.com>
In-Reply-To: <4F9C9299A10AE74E89EA580D14AA10A61A1968@royal64.emp.zapto.org>
References:  <4F9C9299A10AE74E89EA580D14AA10A61A1968@royal64.emp.zapto.org>

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On Tue, Jul 1, 2008 at 5:01 AM, Daniel Eriksson <daniel_k_eriksson@telia.com>
wrote:

>
> I am having problems with silent data corruption on (some) drives
> connected to an MCP55 SATA controller.
>


I have an MCP55 controller here running most of my RAID array.  When I
origionally loaded this machine, I had many problems until I figured out I
could only use every other SATA port with any degree of reliability.

It turned out that with the first two drives I bought, this every-other rule
was true. These drives are:

ad4: 238475MB <SAMSUNG SP2504C VT100-33> at ata2-master SATA300

But When I bought new drives, they happily used every channel:

ad10: 715404MB <WDC WD7500AAKS-00RBA0 30.04G30> at ata5-master SATA300

The difference, I'm lead to believe, is that the Samsung drive is a PATA
drive with a SATA to PATA bridge on it.  The newer "true SATA" drives work
fine.



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