3.0Drive specifications

Unless otherwise noted, all specifications are measured under ambient conditions, at 25°C, and nominal power.

3.1Specification summary table

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

Table 1: Drive specifications for 750, 640 and 500 GB models

 

 

ST9640424AS

ST9750422AS

ST9500424AS

 

ST9750423AS

ST9640423AS

ST9750420AS

ST9500423AS

Drive specification

ST9750423ASG

ST9640423ASG

ST9750420ASG

ST9500423ASG

 

 

 

 

 

Formatted GB

750

640

750

500

 

 

 

 

 

Guaranteed sectors

1,465,149,168

1,250,263,728

1,465,149,168

976,773,168

 

 

 

 

 

Bytes per sector (logical/physical)

512/4K

 

 

 

 

 

 

 

 

Physical read/write heads

4

 

 

4/3

 

 

 

 

 

Discs

2

 

 

 

 

 

 

 

 

Cache (MB)

16

 

 

 

 

 

 

 

 

Recording density in BPI (max)

1,586k

 

 

 

 

 

 

 

 

Track density TPI (tracks/inch max)

341k

 

 

 

 

 

 

 

 

Areal density (Gb/in2 max)

541

 

 

 

Spindle speed (RPM)

5400

 

7200

 

 

 

 

 

 

Average latency (ms)

5.6

 

4.2

 

 

 

 

 

 

Internal transfer rate (Gb/s max)

1130

950

1305

1305

 

 

 

 

 

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

3.0

 

 

 

 

 

 

 

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 (0.370 +/-.008 in)

 

 

 

 

 

 

Width

69.85 +/- 0.25 mm (2.750 +/- 0.010 in)

 

 

 

 

 

Length

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

 

 

 

 

 

 

Weight

115 g (0.254 lb)

 

 

 

 

 

 

 

 

Power-on to ready (sec typical)

3.6

 

4.0

 

 

 

 

 

 

Standby to ready (sec typical)

2.5

 

3.0

 

 

 

 

 

 

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

1.5

 

 

 

 

 

 

 

 

Average seek, read (ms typical)

11.0

 

 

 

 

 

 

 

 

Average seek, write (ms typical)

13.0

 

 

 

 

 

 

 

 

Startup current, +5V (max)

1.0A

 

 

 

 

 

 

 

 

Seek power (typical)

1.9W

 

2.5W

 

 

 

 

 

 

Read power (typical)

1.6W

 

2.1W

 

 

 

 

 

 

4

Momentus Product Manual, Rev. B

Page 10
Image 10
Seagate 7200-RPM, 5400-RPM manual Specification summary table, Drive specifications for 750, 640 and 500 GB models