I've had HFS+ corrrupt my TimeMachine partition, and Disk Utility was unable to repair it. DiskWarroir was no use as the volume was too big (the new 64-bit version addresses this).
HFS+ is still unreliable. The journalling is only for file system meta data. The data in the files is not journaled or checksumed, and can be corrupted without detection.
HFS+ is still unreliable. The journalling is only for file system meta data. The data in the files is not journaled or checksumed, and can be corrupted without detection.