archiving hard drives, Televideo PM/4T and AT&T7300

function, BTW? dd will fail on the first bad block on the device. It also wouldn't work if the SCSI device is using a sector size different from what the raw device driver is expecting. Getting disc images of these discs may be more difficult than you might initially think, because they aren't likely to be either SCSI or IDE. If they are ST506, you have to have a disc interface that matches the sector encoding. It is unlikely you are going to be able to find one that will match using commodity ISA controllers. If the computers are working, you'll probably have to write some code to send the data out through some interface on the computer, like a serial port, dealing with the possiblity of bad sectors. The 7300 was common enough that I would think a program exists somewhere to to that.