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8 Video 3.5 HDD Product Manual, Rev. J
Table 3: Drive specifications summary for 250 and 160GB models
Drive specification ST3250412CS ST3250312CS ST3160316CS
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.) 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 0–4
Multiword DMA modes 0–2
Ultra DMA modes 0–6
Cache buffer 16MB 8MB
Height (max.) 20.20mm / 0.795 in
Width (max.) 101.85mm / 4.010 in
Length (max.) 146.99mm / 5.787 in
Weight (typical) 395g / 0.871 lb
Average latency 5.1ms
Power-on to ready (typical) <6s
Standby to ready (typical) <6s
Track-to-track seek time (typical) <1.0ms (read)
<1.2ms (write)
Average seek (typical) <14.0ms (read)
<15.0ms (write)
Startup current (typical) 12V (peak) 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)