Toshiba A20-S259 Maintenance Manual - Page 28

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) Parameter Storage size (formatted) Speed (RPM) Data transfer speed (Mbits/s) Interface transfer rate (MB/s) Storage density (Kbpi) Track density (Ktpi) Average random seek time (read) (ms) Average random seek time (write) (ms) Motor start up time (ms) Specifications TOSHIBA HDD2181B TOSHIBA HDD2182B TOSHIBA HDD2171B TOSHIBA HDD2183B TOSHIBA HDD2184B 30 40 60 4.200 5.400 4.200 5.400 154.3 - 298.0 200.8 - 333.2 154.3 - 298.0 202.9 - 373.3 100 618 607 618 632 78.9 57.1 78.9 12 - 4 1-14 Satellite A20 Maintenance Manual (960-444)