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Chapter 2 System Overview
Compaq Deskpro EN Series of Personal Computers
Desktop and Minitower Form Factors
Third Edition – September 1998
2-16
Table 2–7. Diskette Drive Specifications
Table 2-7.
Diskette Drive Specifications
(Compaq SP# 179161-001)
Parameter Measurement
Media Type 3.5 in 1.44 MB/720 KB diskette
Height 1/3 bay (1 in)
Bytes per Sector 512
Sectors per Track:
High Density
Low Density
18
9
Tracks per Side:
High Density
Low Density
80
80
Read/Write Heads 2
Average Access Time:
Track-to-Track (high/low)
Average (high/low)
Settling Time
Latency Average
3 ms/6 ms
94 ms/173ms
15 ms
100 ms
Table 2–8. 24x CD-ROM Drive Specifications
Table 2-8.
32x CD-ROM Drive Specifications
(SP# 327659-001)
Parameter Measurement
Interface Type IDE
Transfer Rate:
Max. Sustained
Burst
4800 KB/s
16.6 MB/s
Media Type Mode 1,2, Mixed Mode, CD-DA,
Photo CD, Cdi, CD-XA
Capacity:
Mode 1, 12 cm
Mode 2, 12 cm
8 cm
550 MB
640 MB
180 MB
Center Hole Diameter 15 mm
Disc Diameter 8/12 cm
Disc Thickness 1.2 mm
Track Pitch 1.6 um
Laser
Beam Divergence
Output Power
Type
Wave Length
53.5 +/- 1.5
°
53.6 0.14 mW
GaAs
790 +/- 25 nm
Average Access Time:
Random
Full Stroke
<100 ms
<150 ms
Audio Output Level 0.7 Vrms
Cache Buffer 128 KB