Seagate STM303004N1AAAS-RK DiamondMax 21 SATA Product Manual - Page 12

Drive specifications summary

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Table 2: Drive specifications summary for 320 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 Non-Operational Shock STM3320820AS STM3320620AS 320 Gbytes 625,142,448 4 2 512 63 16 16,383 781 kbits/in max 145 ktracks/in avg 114.4 Gbits/in2 avg 7,200 RPM 1,030 Mbits/sec max 72 Mbytes/sec max 300 Mbytes/sec max PIO modes 0-4 Multiword DMA modes 0-2 Ultra DMA modes 0-6 16 Mbytes 8 Mbytes 26.1 mm (1.028 inches) 101.6 mm (4.000 inches) +/- 0.010 inches 146.99 mm (5.787 inches) 635 grams (1.4 lbs) 4.16 msec 15 sec max 15 sec max

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6
DiamondMax 21 Serial ATA Product Manual, Rev. C
Table 2:
Drive specifications summary
for 320 Gbyte models
Drive specification
STM3320820AS
STM3320620AS
Formatted capacity (512 bytes/sector)*
320 Gbytes
Guaranteed sectors
625,142,448
Heads
4
Discs
2
Bytes per sector
512
Default sectors per track
63
Default read/write heads
16
Default cylinders
16,383
Recording density
781 kbits/in max
Track density
145 ktracks/in avg
Areal density
114.4 Gbits/in
2
avg
Spindle speed
7,200 RPM
Internal data transfer rate
1,030 Mbits/sec max
Sustained data transfer rate OD
72 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
16 Mbytes
8 Mbytes
Height (max)
26.1 mm (1.028 inches)
Width (max)
101.6 mm (4.000 inches) +/- 0.010 inches
Length (max)
146.99 mm (5.787 inches)
Weight (typical)
635 grams (1.4 lbs)
Average latency
4.16 msec
Power-on to ready
15 sec max
Standby to ready
15 sec max
Track-to-track seek time
<0.8 msec typical read;
<1.0 typical write
Average seek, read
<8.5 msec typical
Average seek, write
<10.0 msec typical
Startup current (typical) 12V (peak)
2.8 amps
Voltage tolerance (including noise)
5V ± 5%
12V ± 10%
Ambient temperature
0° to 60°C (operating)
–40° to 70°C (nonoperating)
Temperature gradient
20°C per hour max (operating)
30°C per hour max (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)
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
68 Gs max at 2 msec
Non-Operational Shock
350 Gs max at 2 msec