Hi, ext Marius Gedminas wrote: >> 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) > > (1) I almost never use USB for transferring data. > (2) When I do, I always eject the card. > (3) You can't access the internal card over USB when you've got an > active swap partition. > >> - Device HW watchdog (not the SW one) rebooting the device > > This may have happened, but how exactly can a HW watchdog reboot > scribble random data all over the partition table and/or root directory? > I'd understand if the FAT weren't completely updated and I'd get > cross-linked files or missing free space, but complete garbate in the > root dir? > >> Are you sure neither of these have happened? > > Watchdog resets have happened occasionally. And I usually notice FS > corruption after one of those. > > Still, that doesn't explain the other experiments I did earlier. I > created a 1.7 GB partition (to be really really sure I'm not > accidentally trying to make the filesystem larger than the device), > formatted it as VFAT and created a single large empty file (dd > if=/dev/zero of=/media/mmc2/bigfile), and that caused vfat errors in > dmesg and, at least once, caused the *partition table* to get > overwritten with zeroes. See this (short) thread: > http://lists.maemo.org/pipermail/maemo-users/2008-March/020492.html What if you use the whole card like Windows usually formats them i.e. whole card is a single partition without any partition table? Does that change anything? >> If you're sure, is an external card more reliable? > > Yes. I haven't ever seen FS corruption on the external card, and I > hadn't seen FS corruption on either of the two cards in my old N800. - Eero _______________________________________________ maemo-users mailing list maemo-users@xxxxxxxxx https://lists.maemo.org/mailman/listinfo/maemo-users
