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Momentus 5400.3 PATA Blade Server Product Manual, Rev. B
3
2.0 Drive 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
ST9160821AB, ST9120822AB, ST9100828AB, ST980815AB, ST960815AB, and ST9402116AB 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 for 160 and 120 Gbyte models
Drive specification ST9160821AB ST9120822AB
Formatted Gbytes (512 bytes/sector)* 160 120
Guaranteed sectors 312,581,808 234,441,648
Bytes per sector 512
Physical read/write heads 4 3
Discs 2
Cache (Mbytes) 8
Recording density, BPI (bits/inch typical) 835k
Track density, TPI (tracks/inch typical) 150k
Areal density (Gbits/inch
2
max) 132
Spindle speed (RPM) 5,400
Internal data transfer rate (Mbits/sec max) 352
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 +/-.008 inches)
Width 69.85 +/-0.25 mm (2.750 +/-0.010 inches)
Length 100.50 +/-0.25 mm (3.957 +/-0.010 inches)
Weight (typical) 100 grams (0.22 lb)
Average latency (msec) 5.6
Power-on to ready (sec typical) 3.0
Standby to ready (sec typical) 3.0
Track-to-track seek time (msec typical) 1.0 (read), 1.5 (write)
Average random seek , write (msec typical) 13.0
Average random seek, read (msec typical) 11.0
Average random seek, (msec typical) 12.5
Full-stroke seek (msec) 22 (typical); 24 (max)
Startup current 5V (typical) 1.0 amps