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6 Constellation Serial ATA Product Manual, Rev. D
Table 1: Drive specifications summary for 500 and 160 GB models
Drive specification ST9500530NS ST9160511NS
Formatted Gbytes (512 bytes/sector)* 500 160
Guaranteed sectors 976,773,168 312,581,808
Heads 6 2
Discs 3 1
Bytes per sector 512
Default sectors per track 63
Default read/write heads 16
Default cylinders 16,383
Recording density, KBPI (kbits/in max) 1410
Track density, KTPI (ktracks/in avg.) 200
Areal density, (Gbits/in
2
avg) 283
Spindle speed (RPM) 7200
Internal data transfer rate (Mbits/sec max) 1136
Sustained data transfer rate OD (Mbytes/sec max) 95
I/O data-transfer rate (Mbytes/sec max) 300
ATA data-transfer modes supported PIO modes 0–4
Multiword DMA modes 0–2
Ultra DMA modes 0–6
Cache buffer 32 Mbytes
Weight: (maximum) 196 grams (0.43 lbs) 188 grams (0.41 lbs)
Average latency 4.16 msec
Power-on to ready (sec max) 20 sec
Standby to ready (sec max) 6 sec 4 sec
Track-to-track seek time (msec typical) 0.5 read
0.7 write
Average seek, read (msec typical) 8.0
Average seek, write (msec typical) 8.4
Startup current (typical) 12V (peak) 2.0 amps
Voltage tolerance (including noise) 5V ± 5%
12V ± 5%
Ambient temperature 5° to 55°C (operating)
–40° to 70°C (nonoperating)
Temperature gradient (°C per hour max) 20°C (operating)
20°C (nonoperating)
Relative humidity 5% to 95% (operating)
5% to 95% (nonoperating)
Relative humidity gradient 20% per hour max
Wet bulb temperature (°C max) 37.7 (operating)
40.0 (nonoperating)
Altitude, operating –60.96 m to 3048 m
(–200 ft. to 10,000+ ft.)
Altitude, nonoperating
(below mean sea level, max)
–60.96 m to 12,192 m
(–200 ft. to 40,000+ ft.)
Operational Shock (max at 2 msec) 70 Gs
Non-Operational Shock (max at 2 msec) 400 Gs
Vibration, operating 5–22 Hz: 0.25 Gs, Limited displacement
22–350 Hz: 0.50 Gs
350–500 Hz: 0.25 Gs
Vibration, nonoperating 5–500 Hz: 3.0 Gs