Retrieving data from old Novell external

i had a novel 4.0.x as an old backup server. it has internal HDD for sys and external scsi HDD for vol. lately, this old faithful machine would not boot as the internal hdd had crashed (funny noise when i power it up). i do have the Novell installation disk, but i do not have bootable dos diskettes. therefore i could not install novell anywhere else. hoping that the external hdd (vol) are fine, i have pluck it into a nt server with sp6a. through the disk administrator, it could not read the disk format (unknown). any way or hope i could retrieve data? regards