Messages in this thread | | | Date | Tue, 4 Nov 2008 12:47:33 +0100 | From | Jörn Engel <> | Subject | Re: ext2/3 vs. kingston 32G SD card |
| |
On Tue, 4 November 2008 12:02:25 +0100, Pavel Machek wrote: > > I got 32GB kingston SD card, and am using it with ext2 for storing git > trees etc. > > Unfortunately, every time I run fsck, I get rather nasty corruption. > I switched it to ext3 now, but I believe I have seen corruption even > on volume marked clean, which should be impossible from user error. > > If I suspect wrong block device, what are useful tests to run there?
Not likely in your case, but a number of counterfeited devices are on the market. They contain a much smaller chip inside than is advertised plus some logic to return 0x00 when reading from non-existent memory.
To test for this, simply write 0xff to the complete device and read it back. 'hd' is useful, as it compressed the output into four lines for a good device and a bit more when you bought crap.
Jörn
-- Man darf nicht das, was uns unwahrscheinlich und unnatürlich erscheint, mit dem verwechseln, was absolut unmöglich ist. -- Carl Friedrich Gauß -- 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/
| |