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Table 2
Drive specifications summary for 500GB, 320GB and 250GB models
Drive Specification*
Formatted capacity**
Guaranteed sectors
Heads
Disks
Bytes per sector
(4K physical emulated at 512-byte sectors)
Default sectors per track
Default read/write heads
Default cylinders
Recording density (max)
Track density (avg)
Areal density (avg)
Spindle speed
Internal data transfer rate (max)
Average Data Rate, read/write (MB/s)
Maximum sustained data transfer rate, OD read
I/O data-transfer rate (max.)
Cache buffer
Height (max)
Width (max)
Length (max)
Weight (typical)
Average latency
Power-on to ready (max)
Power-on to ready, 2.5A spin-up code option (typ)
Standby to ready (max)
Average seek, read (typical)
Average seek, write (typical)
Startup current (typical) 12V
Voltage tolerance (including noise)
Ambient temperature
Temperature gradient
Relative humidity
Relative humidity gradient (max)
Wet bulb temperature (max)
Altitude, operating
Altitude, non-operating
(below mean sea level, max)
Operational shock (max)
Non-operational shock (max)
Vibration, operating
Seagate Desktop HDD Product Manual, Rev. J
ST500DM002
ST320DM000
500GB
976,773,168
2
236ktracks/in
19.98mm / 0.787 in
101.6mm / 4.0 in (+ 0.010 in)
146.99mm / 5.787 in
415g / 0.915 lb
<8.5ms (read
<9.5ms (write)
12V: +10% / -7.5%
0° to 60°C (operating)
–40° to 70°C (non-operating)
20°C per hour max (operating)
30°C per hour max (non-operating)
5% to 95% (operating)
5% to 95% (non-operating)
30% per hour
37.7°C (operating)
40.0°C (non-operating)
–304.8m to 3048m
(–1000 ft to 10,000+ ft)
–304.8m to 12,192m
(–1000 ft to 40,000+ ft)
70 Gs at 2ms
350 Gs at 2ms
2Hz to 22Hz: 0.25 Gs, Limited displacement
22Hz to 350Hz: 0.50 Gs
350Hz to 500Hz: 0.25 Gs
Drive Specifications
ST250DM000
320GB
625,142,448
488,397,168
1
4096
63
16
16,383
1413kb/in
2
329Gb/in
7200 RPM
1695Mb/s
125MB/s
144MB/s
600MB/s
16MB
4.16ms
<8.5s
n/a
<8.5s
2.0A
5V: ±5%
250GB
1
6
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