Hi, ext Marius Gedminas wrote: > On Fri, Jun 06, 2008 at 08:18:09AM -0400, Torsten Hoefler wrote: >> On Fri, Jun 06, 2008 at 02:24:07PM +0300, Marius Gedminas wrote: >>> My N810 completely trashes the contents of the internal 2gb "memory >>> card" every couple of weeks or so. I don't trust it *at all* any more. >> did you try to reformat? > > That's what I do: reformat the card with the File Manager on the N810, > create a new swap file, then don't touch the card. Later I will notice > that after a reboot my card is showing complete garbage: > http://mg.pov.lt/n810-fs-corruption.png > > This has happened three or four times since I got my N810. > > Initially I also had the problem with the FAT partition being a bit > larger than the device, but reformatting it with the file manager also > recreates the partition table, and it does that correctly. > > Then I used the internal card to keep my valuable data. Once I started > getting filesystem errors, rebooted and discovered that the partition > table was overwritten by the contents of a text file. Since then I no > longer keep valuable data on the card. Some reasons why FAT may corrupt: - User disconnects the USB cable without "safely unmount" (similarly to re-inserting the memory card card, re-connecting the cable doesn't help, device and desktop OSes forget the changes once you disconnect the storage) - Device HW watchdog (not the SW one) rebooting the device Are you sure neither of these have happened? If you're sure, is an external card more reliable? >> I'm kind of worried to do this because another >> filesystem might lower the lifetime of the flash-stuff by exhibiting >> different write patterns (and since it's soldered in, I don't want to >> destroy it faster than necessary). I'm actually even wondering if Nokia >> changed something in the vfat implementation or if this is standard vfat >> with the superblock in the first device blocks (seems to be very bad for >> flash-based memory). > > I believe there's some balancing going on under the hood. You use JFFS2 > on a MTD device on raw flash; SD cards pretend to be a regular block > device that does write balancing in the hardware. I believe the N810 > has the internals of a SD card soldered on the mainboard. - Eero _______________________________________________ maemo-users mailing list maemo-users@xxxxxxxxx https://lists.maemo.org/mailman/listinfo/maemo-users
