Did that first based on your suggestion. Multiple passes still result in just 1 block transfer error. Boots up fine like before, but kickstart 58 hangs on software update screen. Trying the mfscopy of that rescue to a 5tb to see if it boots there. If that fails, can mfsadd just be done on a copied drive ? something like this: -> dd_rescue from original 3tb to 5tb, -> mfsadd -xm 2000 /dev/sdY ( or what parmeters?) -> mfsaddfix /dev/sdY could that result in successful 5tb?