Maxtor STM3320620AS, STM3160815AS, STM380215AS Drive specifications summary for the 40 Gbyte model

Table 6:	Drive specifications summary for the 40 Gbyte model
Drive specification		STM340215AS
Formatted capacity (512 bytes/sector)*		40 Gbytes
Guaranteed sectors		78,165,360
Heads		1
Discs		1
Bytes per sector		512
Default sectors per track		63
Default read/write heads		16
Default cylinders		16,383
Recording density		824 kbits/in max
Track density		137.259 ktracks/in avg
Areal density		101 Gbits/in2 avg
Spindle speed		7,200 RPM
Internal data transfer rate		930 Mbits/sec max
Sustained data transfer rate OD		78 Mbytes/sec max
I/O data-transfer rate		300 Mbytes/sec max
ATA data-transfer modes supported		PIO modes 0–4
		Multiword DMA modes 0–2
		Ultra DMA modes 0–6
Cache buffer		2 Mbytes
Height (max)		19.99 mm (0.787 inches)
Width (max)		101.6 mm (4.000 inches) +/- 0.010 inches
Length (max)		146.99 mm (5.787 inches)
Weight (typical)		365 grams (0.805 lb.)
Average latency		4.16 msec
Power-on to ready		7.9 sec max
Standby to ready		7.9 sec max
Track-to-track seek time		<1.0 msec typical read; <1.2 msec typical write
Average seek, read		<11 msec typical
Average seek, write		<12 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 75°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°C max (nonoperating)
Altitude, operating		–60.96 m to 3,048 m
		(–200 ft. to 10,000+ ft.)
Altitude, nonoperating		–60.96 m to 12,192 m
(below mean sea level, max)		(–200 ft. to 40,000+ ft.)
Operational Shock		63 Gs max at 2 msec
Non-Operational Shock		350 Gs max at 2 msec

14 DiamondMax 21 Serial ATA Product Manual, Rev. C