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4 Video 3.5 HDD Product Manual, Rev. J
Table 1: Drive specifications summary for 1000GB models
Drive specification ST31000424CS ST31000322CS
Formatted Capacity
(512 bytes/sector)*
1000GB
Guaranteed sectors 1,953,525,168
Heads 4
Disks 2
Bytes per sector 512
Default sectors per track 63
Default read/write heads 16
Default cylinders 16,383
Recording density (max.) 1417kb/in
Track density (avg.) 236 ktracks/in
Areal density (avg.) 341.5Gb/in
2
Spindle speed 5900 RPM
Internal data transfer rate (max.) 1285Mb/s
Sustained data transfer rate (max.) 120MB/s
I/O data-transfer rate (max.) 300MB/s
ATA data-transfer modes supported PIO modes: 0 to4
Multiword DMA modes: 0 to2
Ultra DMA modes: 0 to 6
Cache buffer 16MB 8MB
Height (max.) 26.1mm / 1.028 in
Width (max.) 101.85mm / 4.010 in
Length (max.) 146.99mm / 5.787 in
Weight (typical) 615g / 1.356 lb
Average latency 5.1ms
Power-on to ready (typical) <12s
Standby to ready (typical) <12s
Track-to-track seek time (typical) <1.0ms ( read)
<1.2ms ( write)
Average seek (typical) <14.0ms read
<15.0ms write
Startup current 12V-peak (typical) 2.0A
Voltage tolerance (including noise) 5V ± 5%
12V ± 10%
Operating temperature
(drive case temperature)
0° to 75°C
Non-operating temperature (ambient) –40° to 70°C
Temperature gradient (max.) 20°C per hour (operating)
30°C per hour (non-operating)
Relative humidity 5% to 90% (operating)
5% to 95% (non-operating)
Relative humidity gradient (max.) 30% per hour
Wet bulb temperature (max.) 37.7°C (operating)
40.0°C (non-operating)
Altitude, operating –60.96m to 3,048m
(–200 ft to 10,000+ ft)
Altitude, non-operating
(below mean sea level, max.)
–60.96m to 12,192m
(–200 ft to 40,000+ ft )