linux-kernel - Re: Massive IDE problems. Who leaves data here?

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Message-ID: <20080122222539.5643d6ae@lxorguk.ukuu.org.uk>
Date:	Tue, 22 Jan 2008 22:25:39 +0000
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Manuel Reimer <Manuel.Spam@...fuerspam.de>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: Massive IDE problems. Who leaves data here?

On Tue, 22 Jan 2008 21:40:21 +0100
Manuel Reimer <Manuel.Spam@...fuerspam.de> wrote:

> Jeff Garzik wrote:
> > If your IDE interface is complaining about BadCRC errors, then it's 
> > complaining about hardware problems (bad cable, etc.)
> 
> The cable already has been replaced three times. I even got sure to 
> *not* bend the cable. This all doesn't help.
> 
> May a bad cable really cause corrupted data?

Yes, or dodgy connectors or other problems. The CRC itself is computed by
the hardware each end so a BadCRC error really means the two ends
disagree about the data. 

That is *usually* a cable/electrical noise problem. It can be power and
it can occasionally show up if the software misprograms the timing so the
two ends are a bit out of sync.

Alan
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