The above item fell into my possession today. It appears to be circa
1990, contains three hard disks (or DASD, if you prefer), a 150mb QIC tape
drive, and a twinax interface card.
The IBM web site indicates this machine supports a whopping 20MB of RAM
and 2GB of hard drive space. It still has an OS on the disks if I can
remember which drive went in which bay in the machine (or if the
id is in the drive rather than the backplane)
The IBM site is not forthcoming on additional details on the machine.