Drive specifications summary – Maxtor STM3160215AS User Manual
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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