Seagate BARRACUDA 7200.12 ST31000528AS Product Manual page 14

Drive specifications summary
Table 3:
Drive specification
Formatted capacity (512 bytes/sector)*
Guaranteed sectors
Heads
Disks
Bytes per sector
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.)
Sustained data transfer rate OD (max.)
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 (max.)
Standby to ready (max.)
Track-to-track seek time (typical)
Average seek, read (typical)
Average seek, write (typical)
Startup current (typical) 12V (peak)
Voltage tolerance (including noise)
Ambient temperature
Temperature gradient (max.)
Relative humidity
Relative humidity gradient (max.)
Wet bulb temperature
Altitude, operating
Altitude, non-operating
(below mean sea level, max.)
Operational Shock (max.)
Non-Operational Shock (max.)
8
for 250GB models
ST3250318AS
250GB
488,397,168
1
1
512
63
16
16,383
1413kb/in
236 ktracks/in
2
329Gb/in
7200 RPM
1695Mb/s
125MB/s
300MB/s
PIO modes: 0 to 4
Multiword DMA modes: 0 to 2
Ultra DMA modes: 0 to 6
8MB
19.98mm / 0.787 in
101.6mm / 4.0 in ( + 0.010 in)
146.99mm / 5.787 in
415g / 0.915 lb
4.16ms
<8.5s
<8.5s
<1.0ms (read)
<1.2ms (write)
<8.5ms (read)
<9.5ms (write)
2.0A
5V +10% / -7.5%
12V +10% / -10.0%
0° to 60°C (operating)
–40° to 70°C (non-operating)
20°C per hour (operating)
30°C per hour (non-operating)
5% to 95% (operating)
5% to 95% (non-operating)
30% per hour
37.7°C max (operating)
40.0°C max (non-operating)
–60.96m to 3,048m
(–1000 ft to 10,000+ ft)
–60.96m to 12,192m
(–1000 ft to 40,000+ ft)
70 Gs at 2ms
350 Gs at 2ms
Barracuda 7200.12 Serial ATA Product Manual, Rev. H
ST3160318AS
160GB
312,581,808