Hi all,
recently my SD card just went bonkers. Unfortunately I lost a lot of
photos on it (backups are useless until the data actually gets to the
backup...) but fortunately I was able to use a program to recover about
170 photos.
Anyway, I don't know if it was just static, shock, dead card, or phase
of the moon, so I would like to see if the card is good before I
continue to use it.
I've reformatted it and I get:
$ df
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/mmcblk0p1 500960 500960 0 100% /media/PICS
so I created a file:
dd if=/dev/urandom of=Desktop/random.img bs=1024 count=500960
then copied it to the card, and then copied it back as random-2.img. If
I md5sum the two files, they are identical:
$ md5sum random*
9dcac25cfd8585be5939c0ff969de310 random-2.img
9dcac25cfd8585be5939c0ff969de310 random.img
Does that mean my memory card is good to go, or should I use some other
method of bad sector detection?
It's a Lexar Media 512Mb SD card, a couple of years old. Yes I know I
can get a cheap 2Gb for <$20 but I'm more interested in the principle of
the test :)
thanks for any tips!
--
Iain Buchanan <iaindb at netspace dot net dot au>
This sentence contradicts itself -- no actually it doesn't.
-- Douglas Hofstadter
