System:
- Embedded board with Atmel SAM9x25
- Debian Wheezy Kernel 3.11.6
- 32GB Samsung SDHC card with ext4 root- partition (journal activated)
After system running two weeks or so superblock from rootfs (ext4) at block 0 got overwritten with "trash data". Here is a hex comparison between the an original superblock and the faulty:
- How is it possible, that even the magic number (and everything else) got overwritten?
- Why could it ever be overwritten?
Thx for your help!
