Seagate ST910021A ユーザーズマニュアル

Momentus 7200.1 PATA Product Manual, Rev. C

3

Unless otherwise noted, all specifications are measured under ambient conditions, at 25°C, and nominal 
power. For convenience, the phrases the drive and this drive are used throughout this manual to indicate 
ST910021A. ST980825A, ST96023A and ST94015A model drives.

The specifications listed in this table are for quick reference. For details on specification measurement or 
definition, see the appropriate section of this manual.  

Formatted Gbytes (512 bytes/sector)

100

80

60

40

Guaranteed sectors

195,371,568

156,301,488

117,210,240

78,140,160

Bytes per sector

512

Physical read/write heads

4

4

3

2

Discs

2

2

2

1

Cache (Mbytes)

8

Recording density, BPI (bits/inch max)

700,000

Track density. TPI (tracks/inch max)

114,000

Areal density (Bbits/inch

2 

max)

81

Spindle speed (RPM)

7,200

Internal data transfer rate OD (Mbits/sec max)

539

Sustained data transfer rate OD (Mbytes/sec)

45.8

I/O data-transfer rate (Mbytes/sec max)

100

ATA data-transfer modes supported

PIO modes 0–4

 

Multiword DMA modes 0–2

 

Ultra DMA modes 0–5

Height

9.5 +/-0.2 mm (0.374 +/-.0078 inches)

Width

69.85 +/-0.25 mm (2.75 +/-0.0098 inches)

Length

100.2 +/-0.25 mm (3.945 +/-0.0098 inches)

Weight (typical)

115 grams (0.254 lb)

Average latency (msec)

4.2

Power-on to ready (typical)

4 seconds

Standby to ready (typical)

3 seconds

Startup current 5V (peak)

1.1 amps

Track-to-track seek time (msec typical)

1.5 (read), 2.0 (write)

Average seek, read (msec typical)

10.5

Average seek, write (msec typical)

12.5

Full-stroke seek (msec)

22 (typical); 28 (max)