From: jbradford@dial.pipex.com
To: gen-lists@blueyonder.co.uk (Mark C)
Cc: linux-kernel@vger.kernel.org
Subject: Re: Problems accessing USB Mass Storage
Date: Tue, 17 Sep 2002 21:12:14 +0100 (BST) [thread overview]
Message-ID: <200209172012.g8HKCFrG004537@darkstar.example.net> (raw)
In-Reply-To: <1032291993.1276.12.camel@stimpy.angelnet.internal> from "Mark C" at Sep 17, 2002 08:46:31 PM
> > This is a bit like what we (JE, David Brownell, and I) saw at
> > the USB plugfest in 1999. We had a camera device that we
> > couldn't mount as a filesystem, but we could dd it.
> > When we did that and studied the dd-ed file, we could see a
> > FAT filesystem beginning after the first <N> blocks (but more than
> > 25 sectors IIRC -- more like after 50-100 KB, or maybe even more).
>
> Sorry to sound a bit bewildered, but would be the next best thing for me
> to do on this?,
> I have also been advised by Jonathan Corbet
> to use dd to copy your card to disk with an offset of 25
Have you tried reading from a different card? The common opinion seems to be that the actual data starts some way in to the card, and as you get an input/output error when you try to access the card from the begining, it could be that there is a genuine media error, that is not showing up when you use drivers from another OS, that do not attempt to read those first few blocks, because they 'know' where the filesystem begins.
Just an idea, anyway.
John.
next prev parent reply other threads:[~2002-09-17 19:59 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-09-17 18:15 Problems accessing USB Mass Storage Jonathan Corbet
2002-09-17 18:22 ` Randy.Dunlap
2002-09-17 19:46 ` Mark C
2002-09-17 20:12 ` jbradford [this message]
2002-09-17 21:21 ` Jonathan Corbet
2002-09-17 19:50 ` Thomas Dodd
2002-09-17 19:58 ` Matthew Dharm
2002-09-17 20:13 ` Thomas Dodd
2002-09-17 21:13 ` [Linux-usb-users] " Mark C
2002-09-17 21:40 ` Thomas Dodd
2002-09-17 21:51 ` Mark C
2002-09-17 21:58 ` Rogier Wolff
2002-09-17 22:17 ` Thomas Dodd
2002-09-17 22:23 ` Randy.Dunlap
2002-09-18 9:28 ` Andries Brouwer
2002-09-18 9:22 ` Andries Brouwer
-- strict thread matches above, loose matches on Subject: below --
2002-09-17 11:25 Mark C
2002-09-17 15:18 ` Greg KH
2002-09-17 17:37 ` Thomas Dodd
2002-09-17 17:46 ` Greg KH
2002-09-17 18:06 ` Richard B. Johnson
2002-09-17 20:09 ` Thomas Dodd
2002-09-17 21:01 ` Mark C
2002-09-17 21:43 ` Rogier Wolff
2002-09-17 22:04 ` Thomas Dodd
2002-09-17 22:21 ` Patrick Mansfield
2002-09-17 22:51 ` Mark C
[not found] ` <mailman.1032306001.9987.linux-kernel2news@redhat.com>
2002-09-18 1:37 ` Pete Zaitcev
2002-09-18 6:01 ` Rogier Wolff
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