Date: Thu, 4 Dec 2008 11:32:06 +0100
From: Pavel Machek <pavel@suse.cz>
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: Theodore Tso <tytso@mit.edu>, kernel list <linux-kernel@vger.kernel.org>
Subject: Re: SD/MMC cards: how crappy they are?
Message-ID: <20081204103206.GD22396@elf.ucw.cz>
References: <20081202144830.GB1549@ucw.cz> <493562A5.40308@zytor.com> <20081202165608.GD18162@mit.edu> <4935778E.1020405@zytor.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <4935778E.1020405@zytor.com>
User-Agent: Mutt/1.5.18 (2008-05-17)
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 1279
Lines: 28

On Tue 2008-12-02 09:59:42, H. Peter Anvin wrote:
> Theodore Tso wrote:
> > 
> > If this is your random eject out from your HP laptop problem, note
> > that random ejects while the card is writing can cause corruption of
> > the flash translation layer (FTL), which for some really crappy cards,
> > can permanently damage them; hopefully most of those are gone from the
> > market, but I wouldn't be positive about that.  The better ones will
> > have some kind of journalling scheme for their FTL...
> > 
> 
> I have seen flash cards die permanently from having a partition table it
> didn't like written to it.  Yes, the microcontroller on the flash card
> tried to interpret the partition table, assumed to be MS-DOS style, and
> would crash.

Aha... that explains why I killed few flashcards by tar xzvf /dev/sdX files
... hopefully thats fixed in the better/bigger cards now.

									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/