Maxtor STM3160215AS - Manual (Page 14)

8 DiamondMax 21 Serial ATA Product Manual, Rev. C
Table 3: Drive specifications summary for 250 Gbyte models
Drive specification STM3250824AS STM3250820AS STM3250310AS
Formatted capacity (512 bytes/sector)* 250 Gbytes
Guaranteed sectors 488,397,168
Heads 3 2
Discs 2 1
Bytes per sector 512
Default sectors per track 63
Default read/write heads 16
Default cylinders 16,383
Recording density 790.1 813 kbits/in max 1,110 kbits/in max
Track density 124.5 ktracks/in avg 145 ktracks/in avg 160 ktracks/in avg
Areal density 97.96 Gbits/in 2 avg 114.4 Gbits/in 2 avg 176 Gbits/in 2 avg
Spindle speed 7,200 RPM
Internal data transfer rate 867.2 Mbits/sec max 1,030 Mbits/sec max 1,303 Mbits/sec max
Sustained data transfer rate OD 76.6 Mbytes/sec max 72 Mbytes/sec max 110 Mbytes/sec max
I/O data-transfer rate 300 Mbytes/sec max
ATA data-transfer modes supported PIO modes 0–4
Multiword DMA modes 0–2
Ultra DMA modes 0–6
Cache buffer 8 Mbytes
Height (max) 26.1 mm (1.028 inches) 19.99 mm (.787 inches)
Width (max) 101.6 mm (4.000 inches) +/- 0.010 inches
Length (max) 146.99 mm (5.787 inches)
Weight (typical) 580 grams (1.28 lb.) 600 grams (1.32 lb.) 368 grams (.811 lbs)
Average latency 4.16 msec
Power-on to ready 11 sec max
Standby to ready 11 sec max 15 sec max
Track-to-track seek time <0.8 msec typical read,
<1.0 msec typical write
<1.0 msec typical read,
<1.2 msec typical write
Average seek, read <8.0 msec typical <8.5 msec typical <11.0 msec typical
Average seek, write <9.0 msec typical <10.0 msec typical <12.0 msec typical
Startup current (typical) 12V (peak) 2.8 amps 2.0 amps
Voltage tolerance (including noise) 5V ± 5%
12V ± 10%
Ambient temperature 0° to 60°C per hour max (operating)
–40° to 70°C per hour max (nonoperating)
Temperature gradient 20°C (operating)
30°C (nonoperating)
Relative humidity 5% to 90% (operating)
5% to 95% (nonoperating)
Relative humidity gradient 30% per hour max
Wet bulb temperature 37.7°C max
(operating)
40.0°C max
(nonoperating)
37.7°C max (operating)
37.7°C max (nonoperating)
Altitude, operating –60.96 m to 3,048 m
(–200 ft. to 10,000+ ft.)
Altitude, nonoperating
(below mean sea level, max)
–60.96 m to 12,192 m
(–200 ft. to 40,000+ ft.)
Operational Shock 63 Gs max at 2 msec 68 Gs max at 2 msec 63 Gs max at 2 msec