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DEC HSC90 Cluster Controller

This HSC90 Hierarchical Storage Controller was the interface between the VAX-8650, VAX-7000, VAX-6000/410, VAX-6000/510, and the cabinet full of RA90 disk drives. The cluster controller and the VAXen are all connected to a SC008 Star Coupler with COAX cables. The Star Coupler is in the paper bag.
The HSC90 was conneected to a rack containing 8x RA92 disks and to a Fujitsu tape drive.
Slot Part Number Description
1 L0111-YC HSC90 I/O Controller Processor
2 L0123-AC Memory 4
3 Empty  
4 Empty  
5 Empty  
6 L0119-YA 4 P Disk/Tape Data Channel
7 L0119-YA 4 P Disk/Tape Data Channel
8 L0108-YA Disk Data Channel
9 L0108-YA Disk Data Channel
10 L0108-YB Disk Data Channel
11 Empty  
12 L0124-AA CI Port Processor
13 L0125-AA CI Port Buffer
14 L0118-YA CI Port Link


The HSC90 Hierarchical Storage Controller
The controller boards inside of the HSC-90