If you have a PC with some kind of SCSI-Interface: Shut down the system, attach the disk, boot some modern linux, then create your image with a command like that:

dd bs=10M if=/dev/sdx of=/home/username/scsi-disk.image

You would have to replace x with the disks device and /home/username to a directory you can write to. Think NFS or mounted Windowsshare.