On Mon, 06 Aug 2007 21:17:32 -0400 Jim Cornette <fc-cornette@xxxxxxxxxxxxxx> wrote: > Wouldn't copying a disk with errors using dd also copy the errors onto > another target disk? No. The only way you can actually physically "copy" an error from disk to disk involves using specialist low level disk interfaces to fake the error on the other disk. Even then many disks will refuse to let you. Errors don't move from disk to disk. RAID wouldn't be much point if they did