The H-6591 and H-6595, announced by Hitachi in May 1995, were disk array subsystems with a new architecture that delivered better performance and higher reliability through a combination sized for large-scale computer systems of RAID-5 technology and cache memory.
- Features of the two units:
- （1）They used as many as eight channel-side and eight disk-drive-side microprocessors, which operated independently to control data transfers for better transaction performance.
- （2）The use of RAID-5 technology gave a higher data availability than possible with previous magnetic disks because data remained accessible even if a disk drive should fail.
- （3）The subsystems supported scalable disk capacity (from a minimum of 23 GB to a maximum of 747 GB) and the maximum configuration could be installed in just 2.36 square meters due to high-density mounting of 3.5-inch compact disk drives.
- （4）Uninterrupted 24/7 operation was possible because components were hot swappable.
| Parameter | Specification |
|---|---|
| Host interface | ACONARC/BLMPX |
| RAID array | RAID5 |
| Subsystem capacity | 23GB — 747GB |
| Cache size | 256MB — 16GB |
| External dimensions [mm] | 1268 — 2918x800x1790 |
