Something weird is happening to my N810's internal flash memory (the one with the VFAT-formatted 2 gig "internal memory card", not the 256 meg jffs2 root filesystem). It appears as if writing near the end of the device wraps around and destroys the data at the beginning. I can reproduce it like this: 1. Format the memory card with File Manager 2. Open X Terminal 3. dd if=/dev/zero of=/media/mmc2/bigfile bs=8K 4. Wait ~10 minutes (2 gigs at 4 megs per second). 5. dmesg When dd fills the partition, you'll see the following message in dmesg [ 1793.835937] FAT: Filesystem panic (dev mmcblk0p1) [ 1793.835937] fat_get_cluster: invalid cluster chain (i_pos 122753) [ 1793.835937] File system has been set read-only It's very likely that at this point your partition table also gets overwritten and on next boot you won't see the card until you reformat again. I first discovered this after a week of usage. I had about 850 megs on the "card" when it was remounted read-only. I made the mistake of rebooting and discovered that the partition table and the FAT were both gone. What worries me is that I was nowhere close to filling up the 2 gig partition when it broke. I'm now trying to see if I can find a safe partition size that I can use without losing my data. I initially thought this might be related to https://bugs.maemo.org/show_bug.cgi?id=2802 Now I'm not sure. Marius Gedminas -- To err is human, but to really foul things up requires a computer. -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: application/pgp-signature Size: 189 bytes Desc: Digital signature Url : http://lists.maemo.org/pipermail/maemo-users/attachments/20080330/0b3254b5/attachment.pgp
