HP Portable 386 Compaq Portable 386 Personal Computer Maintenance and Service - Page 9

Inch 1.44 Megabyte Diskette Drive, Megabyte Fixed Disk Drive

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Tracks per Inch 48 Number of Tracks 40 Data Transfer Rate 250 Kb/s Chapter 2.7 3 1/2 Inch 1.44 Megabyte Diskette Drive Table 2-6 lists the specifications for the 3 1/2 inch 1.44 megabyte diskette drive. Table 2-6. 3 1/2 Inch 1.44 Megabyte Diskette Drive Dimensions: Height 1.00 in. (2.5 cm) Depth 5.91 in. (15.0 cm) Width 4.00 in. (10.2 cm) Weight 1.00 lb (0.45 kg) Media: Tracks per Inch Number of Tracks 3 1/2 inch 1.44 megabyte double sided diskette; dual density (720 Kbyte format); high density (1.44 megabyte format) 135 160 Data Transfer Rate 250 Kb/s (1.44 megabyte format) 500 Kb/s (720 Kbyte format) Average Access Time 100 ms Rotational Speed 300 rpm Motor Start Time 800 ms Sectors per Track 18 (1.44 megabyte format) 9 (720 Kbyte format) Bytes per Sector 512 Chapter 2.8 40 Megabyte Fixed Disk Drive Table 2-7 lists the specifications for the 40 megabyte fixed disk drive. Table 2-7. 40 Megabyte Fixed Disk Drive Specifications Dimensions: Height 1.5 in. (3.8 cm) Depth 4.0 in. (10.2 cm) Width 5.8 in. (14.6 cm) Weight 1.9 lb (0.9 kg)

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Tracks per Inch
48
Number of Tracks
40
Data Transfer Rate
250 Kb/s
==============================================================================
Chapter 2.7 3 1/2 Inch 1.44 Megabyte Diskette Drive
Table 2-6 lists the specifications for the 3 1/2 inch 1.44 megabyte diskette
drive.
Table 2-6. 3 1/2 Inch 1.44 Megabyte Diskette Drive
==============================================================================
Dimensions:
Height
1.00 in. (2.5 cm)
Depth
5.91 in. (15.0 cm)
Width
4.00 in. (10.2 cm)
Weight
1.00 lb (0.45 kg)
Media:
3 1/2 inch 1.44 megabyte double sided diskette;
dual density (720 Kbyte format); high density
(1.44 megabyte format)
Tracks per Inch
135
Number of Tracks
160
Data Transfer Rate
250 Kb/s (1.44 megabyte format)
500 Kb/s (720 Kbyte format)
Average Access Time
100 ms
Rotational Speed
300 rpm
Motor Start Time
800 ms
Sectors per Track
18 (1.44 megabyte format)
9 (720 Kbyte format)
Bytes per Sector
512
==============================================================================
Chapter 2.8 40 Megabyte Fixed Disk Drive
Table 2-7 lists the specifications for the 40 megabyte fixed disk drive.
Table 2-7. 40 Megabyte Fixed Disk Drive Specifications
==============================================================================
Dimensions:
Height
1.5 in. (3.8 cm)
Depth
4.0 in. (10.2 cm)
Width
5.8 in. (14.6 cm)
Weight
1.9 lb (0.9 kg)