linux-kernel - Re: single bit errors on files stored on USB-HDDs via USB2/usb

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Message-Id: <200612081201.36789.oliver@neukum.org>
Date:	Fri, 8 Dec 2006 12:01:36 +0100
From:	Oliver Neukum <oliver@...kum.org>
To:	Matthias Schniedermeyer <ms@...d.de>
Cc:	Stefan Richter <stefanr@...6.in-berlin.de>,
	Robert Hancock <hancockr@...w.ca>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	DervishD <lkml@...vishd.net>
Subject: Re: single bit errors on files stored on USB-HDDs via USB2/usb_storage

Am Freitag, 8. Dezember 2006 11:39 schrieb Matthias Schniedermeyer:
> > I.e. it's nearly impossible for noisy hardware to _silently_ cause data
> > corruption. I would suppose USB has similar CRC checks.

It has.

> > Also, you mentioned that the corruption occurs systematically on certain
> > byte patterns. Therefore it's certainly not related to the cables.
> 
> It'd guess that too, but who can that say for sure. :-|

You may have a bit pattern that stresses the controllers and suddenly
a marginal cable may matter.

	Regards
		Oliver

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