420 Series 1-9
1.4 2.5-inch Hard Disk Drive (HDD)
The Hard Disk Drive is a random access non-volatile storage device. It has a non-removable
2.5-inch magnetic disk and mini-winchester type magnetic heads.
The 420CDT supports 1.3 billion bytes (1.26GB) and 810 million bytes (770MB). The
420CDS supports 810 million bytes (770MB).
The 420 series is shown in Figure 1-5.
Figure 1-5 2.5-inch HDD
Specifications for the HDD are listed in Table 1-2.
Table 1-2 2.5-inch HDD specifications
770 MB 1.26 GB
Items MK1926FCV DSOA-20810 MK1301MAV
Formatted capacity (byte) 814,915,584 812,851,200 1,358,880,768
Number of disks 3 2 3
Logical heads 16 16 16
Logical cylinders 1,579 1,575 2,633
Bytes per sector 512 512 512
Rotation speed (rpm) 4,200 4,000 4,200
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