Seagate ST31000528AS Barracuda 7200.12 SATA Product Manual - Page 14

Table 3, for 250GB models - drive

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Table 3: Drive specifications summary for 250GB models 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.) ST3250318AS 250GB 488,397,168 1 1 512 63 16 16,383 1413kb/in 236 ktracks/in 329Gb/in2 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

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