T3400/T3400CT Maintenance Manual
1.4 2.5-inch Hard Disk Drive
The HDD 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 T3400/T3400CT supports a 120 MB HDD.
The HDD is shown in Figure 1-5. Specifications for the HDD are provided in Table 1-2.
Figure 1-5 2.5-inch HDD
Table 1-2 2.5-inch HDD Specifications
Items (CP2124) (MK2124FC)
Storage capacity (MB)
Formatted 121.6 130.1
Number of disks 2 2
Data heads 4 4
Data surfaces 4 4
Tracks per surface 1,123 1,155
Sectors per track 53 (+1) 55 (+1)
Bytes per sector 512 512
Access time (ms)
Track to track 10 5
Average 17 17
Maximum 35 36
Rotation speed (rpm) 3,743 3,200
Data transfer rate (bps)
To/from media 18 M 15.3 M
Interleave 1:1 1:1
Recording method 2-7 RLL/ 1-7 RLL
1-7 RLL
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