imaging DC600A QIC tapes

Having received some of these in the mail, what's the best way of imaging them onto modern media? I hooked up a 150MB SCSI QIC drive to my Linux PC, and it seems to be able to pull data off them happily (even though they're only 60MB). However the tapes contain multiple archives which I'm not too used to handling, plus the archives aren't in any format known to Linux (so I guess dd is the tool for the job there) So, is it just as simple as making sure the tape's rewound, then keeping on issuing: dd if=/dev/nrst0 of=archive01 (with a different output filename each time) ? As nrst0 is a non-rewinding device, I assume the tape will be left at the start of the next archive on the tape after each dd command? Or is it more subtle than that and the archives aren't necessarily back- to-back? Do I need to be issuing some sort of mt command inbetween dd commands to make sure the tape's positioned at the start of the next archive each time?