On 08/06/11 14:58, Durval Menezes wrote:
1) can I simply skip over these sectors (using dd_rescue or multiple dd invocations) when off-line copying the old disk to the new one, trusting the RAID5 to reconstruct the data correctly from the other 2
Noooooooooooo. As we stated early on, it you do that md will have no idea that the data missing is actually missing as the drive won't return a read error.
does a repair take long on your machine? I find that a few repair runs generally gets me enough re-writes to clear the dud sectors and allow an offline clone.
If your dd of the old disk to the new disk aborts with an error, do _not_ under any circumstances (well, unless you have really good backups) do a dd_rescue and just swap the disks.
-- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
