Seagate ST9750423AS, Product Manual

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Momentus Product Manual, Rev. A 5
Table 1: Drive specifications for 750, 640 and 500 GB models
Drive specification
ST9750422AS
ST9750421AS
ST9750420AS
ST9750420ASG
ST9640422AS
ST9640421AS
ST9640420AS
ST9640420ASG
ST9500424AS
ST9500423AS
ST9500423ASG
Formatted GB 750 640 500
Guaranteed sectors 1,465,149,168 1,250,284,896 976,773,168
Bytes per sector 512
Physical read/write heads 4 3
Discs 2
Cache (MB) 16
Recording density in BPI (max) 1,586k
Track density TPI (tracks/inch max) 341k
Areal density (Gb/in
2
max) 541
Spindle speed (RPM) 7200
Average latency (ms) 4.2
Internal transfer rate (Gb/s max) 1305
I/O data transfer rate (Gb/s max) 3.0
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 9.5 +/- 0.2 mm (0.370 +/-.008 in)
Width 69.85 +/- 0.25 mm (2.750 +/- 0.010 in)
Length 100.35 +0.20 / -0.25 mm (3.951 +0.008 / -0.010 in)
Weight 115 g (0.254 lb)
Power-on to ready (sec typical) 4.5
Standby to ready (sec typical) 3.0
Track-to-track seek time, read (ms
typ) 1.5
Average seek, read (ms typical) 11.0
Average seek, write (ms typical) 13.0
Startup current, +5V (max) 1.0A
Seek power (typical) 2.5W
Read power (typical) 2.1W
Write power (typical) 2.3W
Idle mode, low power (typical) 0.70W
Standby mode (typical) 0.15W ***
Sleep mode (typical) 0.15W ***
Voltage tolerance (including noise) +5V ± 5%
Ambient temperature 0°C to 60°C (operating)
–40°C to 70°C (nonoperating)
Temperature gradient (°C/hour max) 20°C (operating), 35°C (nonoperating)
Relative humidity 5% to 95% (operating and nonoperating)
Relative humidity gradient 30% per hour max
Wet bulb temperature (°C max) 37.7 °C (operating), 40 °C (nonoperating)
Altitude, operating –304.8 m to 3,048 m (–1,000 ft to 10,000
+
ft)
Altitude, nonoperating
(meters below mean sea level, max)
–304.8 m to 12,192 m (–1000 ft to 40,000
+
ft)
Shock, operating (Gs max at 2 ms) 350