Table of Contents
Advertisement
1.4
2.S-INCH HARD DISK
DRIVE
The 20-Mbyte (formatted) hard disk drive (HDD) is a random access storage device. It is
equipped with a non-removal 2.5-inch magnetic disk and mini-Winchester type magnetic
heads.
The HDD is shown in Figure 1-4 and its specifications are described in Table 1-2.
Figure 1-4 2.5-inch HDD
Table 1-2 2.5-inch HDD specifications
Item
JDE2825P
CP2024
Storage capacity (Mbytes)
Formatted
21.4
21.4
Number of disks
1
1
Data surfaces
2
2
Data heads
2
2
Track per surface
581
653
Track density (tpi)
1,465
1,700
Sectors per track
36
33
Access time (ms)
Track to track
8
5
Average
25
25
Maximum
45
40
Rotation speed (rpm)
3,109
3,433
Data transfer rate (bps)
To/from media
10 M
10 M
Interleave
1:1
1:1
Recording method
2-7 RLL code
(Run length limited)
Recording density ( ID)
I
(bpi)
39,665
34,816
1-8
Advertisement
Chapters
Table of Contents
