I tried doing a smartctl --smart=on /dev/sda | /dev/sdb But it complained.I piped hdparam -I for the disks to files and ran a diff. Most things made sense, the models and serial numbers differed.
BUT! the firmware revisions differed? one was 3.AAE and the other 3.AADI had a look around the seagate website, but couldn't find any firmware patches?