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Subject: Re: is my RAID safe?
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: M Benz <mbenz74@hotmail.com>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
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Date: Sun, 26 Dec 2004 17:02:04 +0000
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On Sul, 2004-12-26 at 14:30, M Benz wrote:
> Today I found this that at my /var/log/message (kernel 2.6.10):
> 
> Dec 26 21:35:14 s1 kernel: ata5: status=0x51 { DriveReady SeekComplete 
> Error }
> Dec 26 21:35:14 s1 kernel: ata5: error=0x84 { DriveStatusError BadCRC }
> 
> ata5 is md raid1 with ata6, both are sata drives connected to a promise 
> SATA controller.

BadCRC is usually cable noise. The kernel will retry such an event
several times, then fall back to PIO and try that before it gives up.