Toshiba Satellite A20 Series - Figure 1-4 2.5-Inch HDD; Inch Hard Disk Drive; Table 1-1 2.5-Inch HDD Specifications

1 Hardware Overview 1.3 2.5-inch Hard Disk Drive
1.3 2.5-inch Hard Disk Drive
The removable 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 computer supports a
30GB, 40GB, 60GB or 80GB HDD.
The HDD is shown in figure 1-4. The specifications are listed in table 1-1.
Figure 1-4 2.5-inch HDD
Table 1-1 2.5-inch HDD specifications (1/3)
Specifications Parameter
TOSHIBA
HDD2181B
TOSHIBA
HDD2182B
TOSHIBA
HDD2171B
TOSHIBA
HDD2183B
TOSHIBA
HDD2184B
Storage size (formatted)
30 40 60
Speed (RPM)
4.200 5.400 4.200 5.400
Data transfer speed (Mbits/s)
154.3 – 298.0 200.8 –
333.2
154.3 –
298.0
202.9 –
373.3
Interface transfer rate (MB/s)
100
Storage density (Kbpi)
618 607 618 632
Track density (Ktpi)
78.9 57.1 78.9
Average random seek time
(read) (ms)
12
Average random seek time
(write) (ms)
-
Motor start up time (ms)
4
1-14 Satellite A20 Maintenance Manual (960-444)