DEC CI Hierarchical Storage Controllers
From Computer History Wiki
DEC built a whole series of HSC controllers beginning with the HSC50 and ending with the HSC95.
See the following table for characteristics and upgradability of the HSC models:
| DEC HSC Controllers | |||||||
|---|---|---|---|---|---|---|---|
| Model | HSC50 | HSC70 | HSC40 | HSC90 | HSC60 | HSC95 | HSC65 |
| Introduction | 1983 | 1986 | 1989 | 1991 | 1991 | 1993 | 1993 |
| Peak I/O per s | 550 | 1150 | 800 | 1300 | 1300 | 1800 | 1800 |
| max. # of channels | 6 | 8 | 3 | 8 | 3 | 8 | 3 |
| max. # of devices | 24 | 32 | 12 | 48 | 20 | 48 | 32 |
| Upgrades to HSC60 | x | ||||||
| Upgrades to HSC70 | x | ||||||
| Upgrades to HSC90 | x | x | x | ||||
| Upgrades to HSC65 | x | x | |||||
| Upgrades to HSC95 | x | x | x | x | x | ||
