Seagate ST31000528AS Barracuda 7200.12 SATA Product Manual - Page 10

Drive specifications summary - cylinders

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Table 1: Drive specifications summary for 1000 and 750GB 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 (max) 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 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) ST31000528AS 1000GB 1,953,525,168 4 2 512 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 32MB 26.1mm / 1.028 in 101.6mm /4.0 in (+ 0.010 in) 146.99mm / 5.787 in 622g /1.371 lb 4.16ms

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4
Barracuda 7200.12 Serial ATA Product Manual, Rev. G
Table 1:
Drive specifications summary
for 1000 and 750GB models
Drive specification
ST31000528AS
ST3750528AS
Formatted capacity (512 bytes/sector)*
1000GB
750GB
Guaranteed sectors
1,953,525,168
1,465,149,168
Heads
4
3
Disks
2
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 (max)
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
32MB
Height (max.)
26.1mm / 1.028 in
Width (max.)
101.6mm /4.0 in
(+
0.010 in)
Length (max.)
146.99mm / 5.787 in
Weight (typical)
622g /1.371 lb
Average latency
4.16ms
Power-on to ready (max.)
<10.0s
Standby to ready (max.)
<10.0s
Track-to-track seek time (typical)
<1.0ms
read
<1.2ms
write
Average seek, read (typical)
Average seek, write (typical)
<8.5ms typical
<9.5ms typical
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
20°C per hour max (operating)
30°C per hour max (non-operating)
Relative humidity
5% to 95% (operating)
5% to 95% (non-operating)
Relative humidity gradient (max.)
30% per hour
Wet bulb temperature (max.)
37.7°C max (operating)
40.0°C max (non-operating)
Altitude, operating
–304.8m to 3,048m
(–1000 ft to 10,000+ ft)
Altitude, non-operating
(below mean sea level, max)
–304.8m to 12,192m
(–1000 ft to 40,000+ ft)
Operational Shock (max)
70 Gs at 2ms
Non-Operational Shock (max)
300 Gs at 2ms