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Momentus 5400.6 SATA Product Manual, Rev. A
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 the
Momentus 5400.6 SATA models.
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 1: Drive specifications
Drive specification
ST9500325AS
ST9500325ASG
ST9320325AS
ST9320325ASG
ST9250315AS
ST9250315ASG
ST9160314AS
ST9160314ASG ST9120315AS
Formatted Gbytes (512 bytes/sector)* 500 320 250 160 120
Guaranteed sectors 976,773,168 625,142,448 488,397,168 312,581,808 234,441,648
Bytes per sector 512
Physical read/write heads 4 3 2 2 1
Discs 2 2 1 1 1
Cache (Mbytes) 8
Recording density in BPI (bits/inch avg) 1,490k
Track density TPI (tracks/inch avg) 265k
Areal density (Gbits/inch
2
avg) 394
Spindle speed (RPM) 5,400
Average latency (msec) 5.6
Internal transfer rate (Mbits/sec max) 1,175
I/O data transfer rate (Mbytes/sec max) 300
ATA data-transfer modes supported SATA 1.0, 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 mm +/- 0.25 mm (2.75 +/- 0.0098 inches)
Length (max) 100.35 + 0.35 / - 0.25 mm (3.957 + 0.079 / - 0.0098 inches)
Weight (max) 98.8 grams (0.218 lb) 93.5 grams (0.206 lb)
Power-on to ready (sec typical) 3.6
Power-on to ready (sec max) 3.8
Standby to ready (sec typical) 1.8
Standby to ready (sec max) 2
Track-to-track seek time, read (msec typical) 1
Average seek, read (msec typical) 14