Datasheet
4 DiamondMax 20 PATA Product Manual, Rev. A
Table 1: Drive specifications summary for 300 and 250 Gbyte models
Drive specification STM3300622A STM3250624A STM3250623A
Formatted Gbytes (512 bytes/sector)* 300 250 250
Guaranteed sectors 586,072,368 488,397,168 488,397,168
Bytes per sector 512
Default sectors per track 63
Default read/write heads 16
Default cylinders 16,383
Recording density 790.1 kbits/in max 763 kbits/in max
Track density 124.5 ktracks/in avg 120 ktracks/in avg
Areal density 97.69 Gbits/in
2
avg 91.56 Gbits/in
2
avg
Spindle speed 7,200 RPM
Internal data transfer rate 867.2 Mbits/sec max 760 Mbits/sec max
Sustained data transfer rate OD 76.6 Mbytes/sec max 65 Mbytes/sec max
I/O data-transfer rate 100 Mbytes/sec max
ATA data-transfer modes supported PIO modes 0–4
Multiword DMA modes 0–2
Ultra DMA modes 0–5
Cache buffer 16 Mbytes
Height (max) 26.11 mm (1.028 inches)
Width (max) 101.6 mm (4.000 inches) +/- 0.010 inches 101.85 mm (4.010 inches)
Length (max) 146.99 mm (5.787 inches)
Weight (max) 655 grams (1.44 lb.) 580 grams (1.28 lb.) 635 grams (1.39 lb.)
Average latency 4.16 msec
Power-on to ready (max) 11.0 sec 10.0 sec
Standby to ready (max) 11.0 sec 10.0 sec
Track-to-track seek time <0.8 msec typical (read), <1.0 msec typical (write)
Average seek, read <11.0 msec typical)
Average seek, write <12.0 msec typical)
Startup current (typical) 12V (peak) 2.8 amps
Voltage tolerance (including noise) 5V ± 5%
12V ± 10%
Ambient temperature 0° to 60°C (operating)
–40° to 70°C (nonoperating)
Temperature gradient 20°C per hour max (operating)
30°C per hour max (nonoperating)
Relative humidity 5% to 90% (operating)
5% to 95% (nonoperating)
Relative humidity gradient 30% per hour max
Wet bulb temperature 37.7°C max (operating)
40.0°C max (nonoperating)
Altitude, operating –60.96 m to 3,048 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 63 G max at 2 msec
Non-Operational Shock 300 G max at 2 msec 350 G max at 2 msec 300 G max at 2 msec
Vibration, operating 5–22 Hz: 0.25 G, Limited displacement
22–350 Hz: 0.5 G
350–500 Hz: 0.25 G
5–22 Hz:
Limited displacement
23–350 Hz:
0.5 G acceleration