Seagate ST94011A, ST94811A, ST92811A Drive specifications, Specification summary, Specifications

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 ST94011A, ST92011A, ST92811A, and ST94811A model drives.

2.1Specification summary

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:	Specifications
Drive specification		ST94011A	ST94811A	ST92011A	ST92811A
Formatted Gbytes (512 bytes/sector)		40	40	20	20
Guaranteed sectors		78,140,160	78,140,160	39,070,080	39,070,080
Bytes per sector		512
Physical read/write heads		2	2	1	1
Discs		1	1	1	1
Cache (Mbytes)		2	8	2	8
Recording density, BPI (bits/inch max)		642,000
Track density. TPI (tracks/inch max)		100,780
Areal density (Mbits/inch2 max)		65
Spindle speed (RPM)		5,400
Internal data transfer rate OD (Mbytes/sec max)		48.25
Sustained data transfer rate OD (Mbytes/sec)		34.5
I/O data-transfer rate (Mbytes/sec max)		100
ATA data-transfer modes supported		PIO modes 0–4; Multiword DMA modes 0–2; Ultra DMA modes 0–5
Height		9.5 +/-0.2 mm (0.374 +/-.0078 inches)
Width		69.85 +/-0.25 mm (2.75 +/-0.0098 inches)
Length		100.2 +/-0.25 mm (3.945 +/-0.0098 inches)
Weight (typical)		99 grams (0.218 lb.)
Average latency (msec)		5.6
Power-on to ready (sec typical)		3.9
Standby to ready (sec typical)		2.6 sec
Startup current 5V (peak)		1.2 amps
Track-to-track seek time (msec typical)		1.5 (read), 2.0 (write)
Average seek time (msec typical)		12.0
Average seek, read (msec typical)		12.0
Average seek, write (msec typical)		14.0

Momentus 5400.1 Product Manual, Rev. F 3