Product manual

4 Barracuda 7200.12 Serial ATA Product Manual, Rev. H
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% / -10.0%
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