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IBM 3310 direct access storage

IBM 3310 Direct Access Storage

IBM 3310 Direct Access Storage

The IBM 3310 Direct Access Storage was a compact, economically priced, high-performance direct access storage device for use with the IBM 4331 Processor. The 3310 used a fixed media design. Heads, arms and the media were packaged in a fixed, sealed disk enclosure providing for increased data density. The sealed disk enclosure design assured a reduction in disk surface contamination and resulted in improved reliability. Operator involvement in auxiliary storage management was eliminated.

Characteristics

Performance
Average seek time (ins) 27
Average latency (ins) 9.6
Data rate (MB/sec.) 1.031
Capacities
Data blocks per drive 126,016
Bytes per block (sector) 512
Bytes per drive 64.5MB
Data blocks (sectors) per track 32