Sage IV info

Hi all - Snagged a Sage IV machine, running p-System (IV.21) with the Modula-2 suite installed on the internal hard drive (which I believe is 20mb; I haven't disassembled the machine far enough to ID the drive and I don't have any of the hard drive utilities available on the machine to probe with). I'd like to back up the hard drive before I do anything else with this thing, especially since I don't think the Modula-2 software has been archived anywhere (if I'm incorrect in this regard do let me know). Plus there's a sweet half-finished Vampire novel on the drive that I simply must save. Anyone have any experience with these and have any backup suggestions? I'm considering writing a quick Modula-2 program to dump the drive sector-by-sector over the serial port but if there's some prior art here I'm a big fan of saving time. Incidentally -- anyone have any contact with David Erhart, the guy who runs sageandstride.org? His FTP site (which hosts a lot of the documentation, schematics & software) is currently down; I've e-mailed him to no response. (Anyone happen to have this stuff archived?) Thanks as always, Josh