AT&T 3B2/300 Technical Reference Manual page 225

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155-Megabyte Hard Disk (KS-23483,L25)
155-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 40,000 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
3597 revolutions per minute
3.25 inches
5.75 inches
8.0 inches
512
35
9
964 Accessible, 966 Total
303,660 blocks (512 bytes)
SCSI (Single-ended only)
10.0 megabits per second (1250 kilobytes per second)
8.34 milliseconds, average
16.5 milliseconds, average
43 milliseconds, maximum
The default device partitioning for this disk drive depends on the configuration of the computer and
the release of the UNIX operating system.
EQUIPMENT DESCRIPTION 2-201