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

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Message-ID: <45795A32.30107@s5r6.in-berlin.de>
Date:	Fri, 08 Dec 2006 13:27:30 +0100
From:	Stefan Richter <stefanr@...6.in-berlin.de>
To:	Oliver Neukum <oliver@...kum.org>
CC:	Matthias Schniedermeyer <ms@...d.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

Oliver Neukum wrote:
> Am Freitag, 8. Dezember 2006 11:39 schrieb Matthias Schniedermeyer:
>> > 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.

And one more thing: I heard of FireWire enclosures which corrupted data
(although AFAIR with error detection by the drivers) due to overheating
PHY chip or bridge chip. Gluing a small passive heat sink to the
respective chip solved it in the reported case.
-- 
Stefan Richter
-=====-=-==- ==-- -=---
http://arcgraph.de/sr/
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