On Thu, Dec 04, 2003 at 09:57:38AM -0800, Dror Matalon wrote: > > I've seen this comment several times from different people. > Would someone care to explain how you would get data corruption? I > thought that the whole idea of the log is to provide a journal similar > to what you get in a journaling file system.
> So what am I missing in this picture? That a journalling file system can _also_ have file corruption if you have write caching enabled and no battery back up. If the drive tells the OS, "Yep! It's all on the disk!" bit it is _not_ actually scribed in the little bitty magnetic patterns -- and at that very moment, the power goes away -- the data that was reported to have been on the disk, but which was actually _not_ on the disk, is no longer anywhere. (Well, except in the past. But time travel was disabled some versions ago. ;-) A -- ---- Andrew Sullivan 204-4141 Yonge Street Afilias Canada Toronto, Ontario Canada <[EMAIL PROTECTED]> M2P 2A8 +1 416 646 3304 x110 ---------------------------(end of broadcast)--------------------------- TIP 7: don't forget to increase your free space map settings