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Date: Sun, 5 Nov 2006 11:37:12 -0500 From: "Albert Cahalan" <acahalan@...il.com> To: "Albert Cahalan" <acahalan@...il.com>, kangur@...com.net, mikulas@...ax.karlin.mff.cuni.cz, linux-kernel@...r.kernel.org Subject: Re: New filesystem for Linux On 11/4/06, Jan-Benedict Glaw <jbglaw@...-owl.de> wrote: > On Sat, 2006-11-04 14:59:53 -0500, Albert Cahalan <acahalan@...il.com> 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) 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. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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