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Message-ID: <20081204103206.GD22396@elf.ucw.cz> Date: Thu, 4 Dec 2008 11:32:06 +0100 From: Pavel Machek <pavel@...e.cz> To: "H. Peter Anvin" <hpa@...or.com> Cc: Theodore Tso <tytso@....edu>, kernel list <linux-kernel@...r.kernel.org> Subject: Re: SD/MMC cards: how crappy they are? 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@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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