Seagate ST93811AS, ST98823AS, ST96812AS 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 ST9120821AS, ST9100824AS, ST98823AS, ST96812AS, ST94813AS and ST93811AS 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
Drive specification		ST9120821AS	ST9100824AS	ST98823AS	ST96812AS	ST94813AS	ST93811AS
Formatted Gbytes (512 bytes/sector)		120	100	80	60	40	30
Guaranteed sectors		234,441,648	195,371,568	156,301,488	117,210,240	78,140,160	58,605,120
Bytes per sector		512
Default sectors per track		63
Default read/write heads		16
Default cylinders		16,383
Physical read/write heads		4	4	3	2	2	1
Discs		2	2	2	1	1	1
Recording density in BPI		778k
(bits/inch max)
Track density TPI (tracks/inch max)		126k
Areal density (Mbits/inch2 max)		98.2
Spindle speed (RPM)		5,400
Internal transfer rate		42
(Mbytes/sec max)
I/O data transfer rate		150
(Mbytes/sec max)
ATA data-transfer modes supported		SATA 1.0, SATA II
		PIO modes 0–4
		Multiword DMA modes 0–2
		Ultra DMA modes 0–6
Cache buffer		8 Mbytes
Height (max)		9.5 +/- 0.2 mm (0.374 +/- .0078 inches)
Width (max)		69.85 mm (2.75 +/- 0.0098 inches)
Length (max)		100.5 +/- 1.6 mm (3.96 +/- 0.063 inches)
Weight (typical)		100 grams (0.22 lb)
Average latency (msec)		5.56
Power-on to ready (typical)		3.5 sec
Standby to ready (typical)		3.0 sec

Momentus 5400.2 SATA Product Manual, Rev. C 3