Re: SD/MMC cards: how crappy they are?

From: H. Peter Anvin
Date: Tue Dec 02 2008 - 11:31:14 EST

Pavel Machek wrote:
> ...maybe it was because of powerfail? I'll try to run badblocks to
> recover it...
> ...I did. Badblocks did not help, but cat /dev/zero > /dev/mmc1
> did.. And yes, thosse 'temporarily bad blocks' seem very much
> powerfail related.

Power failures can, indeed, do nasty things to SD/MMC cards, especially
power rail sag in the middle of writes.

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