Momentus 5400.2 Product Manual, Rev. D
3
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
ST9100823A, ST9808211A, ST960822A, ST9408114A, and ST9308110A model drives.
2.1 Specification summary
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: Specifications
Drive specification ST9100823A ST9808211A ST960822A ST9408114A ST9308110A
Formatted Gbytes (512 bytes/sector) 100 80 60 40 30
Guaranteed sectors 195,371,568 156,301,488 117,210,240 78,140,160 58,605,120
Bytes per sector 512
Physical read/write heads 4 3 3 2 2
Discs 2 2 2 1 1
Cache (Mbytes) 8
Recording density, BPI (bits/inch typical) 703,000
Track density. TPI (tracks/inch typical) 115,000
Areal density (Gbits/inch2 max) 86
Spindle speed (RPM) 5,400
Internal data transfer rate OD
(Mbytes/sec max) 48.25
I/O data-transfer rate (Mbytes/sec max) 100
ATA data-transfer modes supported PIO modes 0–4; Multiword D MA modes 0–2; Ultra DMA modes 0–5
Height 9.5 +/-0.2 mm (0.374 +/-.008 inches)
Width 69.85 +/-0.25 mm (2.750 +/-0.010 inche s)
Length 100.2 +/-0.25 mm (3.945 +/-0.010 inches)
Weight (typical) 100 grams (0.22 lb)
Average latency (msec) 5.6
Power-on to ready (sec typical) 3.5
Standby to ready (sec typical) 3.0
Startup current 5V (typical) 1.0 amps
Track-to-track seek time (msec typical) 1.0 (read), 1.5 (write)
Average seek time (msec typical) 12.5
Average seek, read (msec typical) 12.5
Average seek, write (msec typical) 14 .5
Full-stroke seek (msec) 22 (typical); 24 (max)
Seek power (typical) 2.3 watts