Altos Computer Systems Altos 486 — Altos 486 System Reference Manual – Service & Technical Guide PDF

PERFORMANCE SPECIFICATIONS Memory Capacity: Unformatted Drive (Megabytes) Surface (Megabytes) Track (Kilobytes) Cylinder (Kilobytes) 25.5 6.38 10.416 41.664 Formatted Drive (Megabytes) Surface (Megabytes) Track (Kilobytes) Sector (bytes) Sector/track 20 10 8 512 16 Number of: Cylinders Head/Cylinder Data Tracks Surfaces Disks 612 4 2448 4 2 Transfer rate (Megabits/sec.) 5.0 Access Time Average Latency (ms) 8.33 Seek Time (including settling time) Single Track (ms) 15 Average (ms) 85 Maximum (ms) 190 Rotational Speed (rpm) 3600 Recording Density Areal (TPI x BPI) (Mbi ts/sq. in. ) Linear (MFM) Radial (Tracks per inch) 5.90 10000 588 Disk Diameter (inches) 5.250 2-8