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