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Momentus 5400 FDE.3 SATA Product Manual, Rev. A
5
2.0 Drive specifications
Unless otherwise noted, all specifications are measured under ambient conditions, at 25°C, and nominal
power.
2.1 Specification 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 2: Drive specifications
Drive specification ST9320322AS ST9160312AS ST9120312AS
Formatted Gbytes (512 bytes/sector)* 320 160 120
Guaranteed sectors 625,142,448 312,581,808 234,441,648
Bytes per sector 512
Physical read/write heads 4 2 2
Discs 2 1 1
Cache (Mbytes) 8
Recording density in BPI (bits/inch max) 1,337k
Track density TPI (tracks/inch max) 191.5k
Areal density (Gbits/inch
2
max) 253
Spindle speed (RPM) 5,400
Internal transfer rate (Mbits/sec max) 830
I/O data transfer rate (Gbits/sec max) 3.0
ATA data-transfer modes supported SATA 1.5/3.0, Serial ATA Revision 2.6
PIO modes 0–4
Multiword DMA modes 0–2
Ultra DMA modes 0–6
Height (max) 9.5 +/- 0.2 mm (0.374 +/- .0078 inches)
Width (max) 69.85 +/- 0.249 mm (2.75 +/- 0.0098 inches)
Length (max) 100.33 +/- 0.25 mm (3.95 +/- 0.010 inches)
Weight (typical) 98 grams (0.212 lb) 93 grams (0.205 lb)
Average latency (msec) 5.6
Power-on to ready (sec typical) 3.4
Standby to ready (sec typical) 3.2
Track-to-track seek time, read (msec typical) 1.5
Average seek, read (msec typical) 11.0
Full-stroke seek, read (msec) 24 (typical)
Startup current, +5V (max) 1.0 amps
Seek power (typical) 2.0 watts
Read/write power (typical) Read: 1.6 watts; Write: 1.9 watts