Albert Cahalan wrote: > On 11/4/06, Jan-Benedict Glaw <jbglaw@xxxxxxxxxx> wrote: > > Albert Cahalan <acahalan@xxxxxxxxx> wrote: > > > BTW, a person with disk recovery experience told me that drives > > > will sometimes reorder the sectors. Sector 42 becomes sector 7732, > > > sector 880880 becomes sector 12345, etc. The very best filesystems > > > can handle with without data loss. (for example, ZFS) Merely great > > > filesystems will at least recognize that the data has been trashed. > > > > Uh? This should be transparent to the host computer, so logical sector > > numbers won't change. > > "should be" does not imply "won't" :-) > > On a drive which is capable of remapping sectors, imagine what > happens if the remapping data itself is corrupted. (the user data > is perfectly fine and is not being relocated) I would consider this a defective drive. > What I mean is that the logical sector numbers not only change, > but they are the only thing changing. The user data never moves > to a different physical location, and is never intended to move. > The user data is perfectly readable. It just appears in the wrong > place as viewed by the OS. Just like defective drive electronics; the data is ok, but the electronics corrupts the I/O. No FS could help you there, AFAIK. BTW, why is this thread not on fsdevel? Thanks! -- Al - To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
