Seagate ST9160301AS, ST980313ASG, ST9500325AS Drive specifications, Specification summary table

2.0Drive specifications

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 5400.6 SATA models.

2.1Specification summary table

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. .

Table 1:	Drive specifications for 500, 400 and 320 GB models
		ST9500325AS		ST9320325AS
Drive specification		ST9500325ASG	ST9400326AS	ST9320325ASG
Formatted Gbytes (512 bytes/sector)*		500	400	320
Guaranteed sectors		976,773,168	781,422,768	625,142,448
Bytes per sector		512
Physical read/write heads		4		3
Discs		2		2
Cache (Mbytes)		8
Recording density in BPI (bits/inch avg)		1,490k
Track density TPI (tracks/inch avg)		265k
Areal density (Gbits/inch2 avg)		394
Spindle speed (RPM)		5,400
Average latency (msec)		5.6
Internal transfer rate (Mbits/sec max)		1,175
I/O data transfer rate		300
(Mbytes/sec max)
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 (max)		9.5 +/- 0.2 mm (0.374 +/- .0079 inches)
Width (max)		69.85 mm +/- 0.25 mm (2.75 +/- 0.0098 inches)
Length (max)		100.35 + 0.20 / - 0.25 mm (3.957 + 0.0079 / - 0.0098 inches)
Weight (max)		98.8 grams (0.218 lb)
Power-on to ready (sec typical)		3.6
Power-on to ready (sec max)		3.8
Standby to ready (sec typical)		1.8
Standby to ready (sec max)		2
Track-to-track seek time, read (msec typical)		1

Momentus 5400.6 SATA Product Manual, Rev. E 3