AT&T 3B2/300 Technical Reference Manual page 228

EQUIPMENT D E S C R I P T I O N - - - - - - - - - - - - - - - - - - - - - - - - - - -
300-Megabyte Hard Disk (KS-23371,L31)
300-Megabyte Hard Disk Equipment Characteristics
Reliability.
Life
Error Rates
Physical.
Disk Type
Rotational Speed
Height
Width
Depth
Bytes/Sector
Sectors/Track
Tracks/Cylinder
Cylinders
Formatted Size
Operational.
Interface
Transfer Rate
Latency
Seek Time
Default Device Partitioning
5 years or 30,000 hours
Recoverable (soft) read errors occur less than 1 in 10 10 bits transferred.
Unrecoverable (hard) read errors occur less than 1 in 10
12
bits
transferred.
5.25-inch, Winchester drive
3600 revolutions per minute
3.25 inches
5.75 inches
8.0 inches
512
35
15
1215 Accessible, 1224 Total
619,650 blocks (512 bytes)
ESDI
10.0 megabits per second (1250 kilobytes per second)
8.33 milliseconds, average
18 milliseconds, average
40 milliseconds, maximum
The default device partitioning for this disk drive depends on the configuration of the computer and
the release of the UNlX operating system.
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