Seagate ST980813ASG, ST9200420ASG manual 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 ST9200420ASG, ST9200420AS, ST9160823AS, ST9160823ASG, ST9120823AS, ST9100821AS, ST980813AS and ST980813ASG 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
		ST9200420ASG	ST9160823AS			ST980813AS
Drive specification		ST9200420AS	ST9160823ASG	ST9120823AS	ST9100821AS	ST980813ASG
Formatted Gbytes (512 bytes/sector)*		200	160	120	100	80
Guaranteed sectors		390,721,968	312,581,808	234,441,648	195,371,568	156,301,488
Bytes per sector		512
Default sectors per track		63
Default read/write heads		16
Default cylinders		16,383
Physical read/write heads		4		3	3	2
Discs		2		2	2	1
Recording density in BPI (bits/inch max)		1,014,000	853,000
Track density TPI (tracks/inch max)		162,600	155,000
Areal density (Gbits/inch2 max)		169.4	131
Spindle speed (RPM)		7,200
Internal transfer rate (Mbits/sec max)		850	711
Sustained transfer rate OD (Mbytes/sec)		69.5	59
I/O data transfer rate (Gb/s max)		3.0 (can also be configured for 1.5Gb/s operation)
ATA data-transfer modes supported		SATA-1
		PIO modes 0–4
		Multiword DMA modes 0–2
		Ultra DMA modes 0–5
Cache buffer (Mbytes)		16	8
Height (max)		9.5 +/- 0.2 mm (0.374 +/- .0078 inches)
Width (max)		69.85 mm +/- 0.25 mm (2.75 +/- 0.00984 inches)
Length (max)		100.5 +/- 0.25 mm (3.957 +/- +/- 0.00984 inches)
Weight (max)		115 grams (0.254 lb)
Average latency (msec)		4.17 msec
Power-on to ready (typical)		4 seconds

Momentus 7200.2 SATA Product Manual, Rev. E 3