Seagate ST9320310AS ユーザーズマニュアル

4

Momentus Product Manual, Rev. D

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 the 
Momentus models.

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

Formatted GB*

640

500

400

guaranteed logical blocks

1,250,263,728

976,773,168

781,422,768

bytes per physical sector

4096

512

512

4096

Physical read/write heads

4

Discs

2

Cache (MB)

8

Recording density in BPI (bits/in avg)

1560k

Track density TPI (tracks/in avg)

325k

Areal density (Gb/in

2 

avg)

507

Spindle speed (RPM)

5400

Average latency (ms)

5.2

Internal transfer rate (Mb/s max)

1175

I/O data transfer rate (MB/s max)

300

ATA data-transfer modes supported

SATA 1.0, Serial ATA Revision 2.6

 

PIO modes 0–4

 

Multiword DMA modes 0–2

 

Ultra DMA modes 0–6

Height

9.5 +/- 0.2 mm (0.374 +/-.008in)

Width

69.85 mm +/- 0.25 mm (2.75 +/- 0.010in)

Length

100.35 + 0.20 / - 0.25 mm (3.951 + 0.008 / - 0.010in)

Weight

<100 g (0.220 lb)

Power-on to ready (sec typical)

3.6

Power-on to ready (sec max)

4.5

Standby to ready (sec typical)

2.5

Standby to ready (sec max)

3.5

Track-to-track seek time, read (ms typical)

1.5

Average seek, read (ms typical)

13.0

Full-stroke seek, read (ms max)

27.0

Startup current, +5V (max)

1.0A