[$] A tale of two data-corruption bugs

There have been two bugs causing filesystem corruption in the newsrecently. One of them, a bug in ext4, has gotten the bulk of theattention, despite the fact that it is an old bug that is hard to trigger.The other, however, is recent and able to cause data loss onfilesystems installed on a RAID 0 array. Both are interestingexamples of how things can go wrong, and, thus, merit a closer look.