Seagate STM303004N1AAAS-RK DiamondMax 21 SATA Product Manual - Page 14

Table 3, for 250 Gbyte models

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Table 3: Drive specifications summary for 250 Gbyte models Drive specification Formatted capacity (512 bytes/sector)* Guaranteed sectors Heads Discs Bytes per sector Default sectors per track Default read/write heads Default cylinders Recording density Track density Areal density Spindle speed Internal data transfer rate Sustained data transfer rate OD I/O data-transfer rate ATA data-transfer modes supported Cache buffer Height (max) Width (max) Length (max) Weight (typical) Average latency Power-on to ready Standby to ready Track-to-track seek time Average seek, read Average seek, write Startup current (typical) 12V (peak) Voltage tolerance (including noise) Ambient temperature Temperature gradient Relative humidity Relative humidity gradient Wet bulb temperature Altitude, operating Altitude, nonoperating (below mean sea level, max) Operational Shock STM3250824AS STM3250820AS STM3250310AS 250 Gbytes 488,397,168 3 2 2 1 512 63 16 16,383 790.1 813 kbits/in max 1,110 kbits/in max 124.5 ktracks/in avg 97.96 Gbits/in2 avg 145 ktracks/in avg 114.4 Gbits/in2 avg 160 ktracks/in avg 176 Gbits/in2 avg 7,200 RPM 867.2 Mbits/sec max 1,030 Mbits/sec max 1,303 Mbits/sec max 76.6 Mbytes/sec max 72 Mbytes/sec max 110 Mbytes/sec max 300 Mbytes/sec max PIO modes 0-4 Multiword DMA modes 0-2 Ultra DMA modes 0-6 8 Mbytes 26.1 mm (1.028 inches) 19.99 mm (.787 inches) 101.6 mm (4.000 inches) +/- 0.010 inches 146.99 mm (5.787 inches) 580 grams (1.28 lb.) 600 grams (1.32 lb.) 368 grams (.811 lbs) 4.16 msec 11 sec max 11 sec max 15 sec max

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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