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MOMENTUS 5400.6 SATA PRODUCT MANUAL, REV. G 4
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 definition, see the
appropriate section of this manual. .
Table 1 Drive specifications for 500, 400 and 320 GB models
Drive specification
ST9500325AS
ST9500325ASG
ST9320325AS
ST9320325ASG
Formatted Gbytes (512 bytes/sector)* 500 320
Guaranteed sectors 976,773,168 625,142,448
Bytes per sector 512
Physical read/write heads 4 3
Discs 2 2
Cache (Mbytes) 8
Recording density in BPI (bits/inch avg) 1490k
Track density TPI (tracks/inch avg) 265k
Areal density (Gbits/inch
2
avg) 394
Spindle speed (RPM) 5400
Average latency (msec) 5.6
Internal transfer rate (Mbits/sec max) 1175
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 +/- .0079 inches)
Width (max) 69.85 mm +/- 0.25 mm (2.75 +/- 0.0098 inches)
Length (max) 100.35 + 0.20 / - 0.25 mm (3.957 + 0.0079 / - 0.0098 inches)
Weight (max) 98.8 grams (0.218 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
Full-stroke seek, read (msec max) 30
Startup current, +5V (max) 1 amp
Seek power (typical) 1.54 watts
Read/write power (typical) Read: 1.40 watts; Write: 1.78 watts
Idle mode, low power (typical) 0.67 watts
Standby mode 0.20 watts (typical)***
Sleep mode 0.20 watts (typical)***
Voltage tolerance (including noise) +5V ± 5%
Ambient temperature 0° to 60°C (operating), –40° to 70°C (nonoperating)
Temperature gradient
(°C per hour max)
20°C (operating)
35°C (nonoperating)