linux-kernel - Re: SD/MMC cards: how crappy they are?

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Message-ID: <49382973.4000908@zytor.com>
Date:	Thu, 04 Dec 2008 11:03:15 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Pavel Machek <pavel@...e.cz>
CC:	Theodore Tso <tytso@....edu>,
	kernel list <linux-kernel@...r.kernel.org>
Subject: Re: SD/MMC cards: how crappy they are?

Pavel Machek wrote:
>>>
>> 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.
> 

Also had a batch of cards which would silently "correct" the partition
table for you to align the partitions to its flash erase blocks.

	-hpa
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