Commodity			SCSI hard drive
Manufacturer			Seagate
Model number			ST318406LW
Data buffer			4 096 KB
Interleave			1:1
Number of active heads			2
Number of I/O connector pins			68
Number of I/O data bus bits			16
Data buffer size			4 MB
Performance			Supports industry standard Ultra160 SCSI interface Programmable multi-segmentable cache buffer (see Section 3.1) 10 028 rpm spindle; average latency = 2.99 ms Command queuing of up to 64 commands Background processing of queue Supports start and stop commands (spindle stops spinning)
Performance characteristics
Formatted capacity			18.352 GB (formatted rounded off values)
Read/write heads			2
Bytes per track			348 900 bytes (average rounded off values)
Bytes per surface			12 183 MB(unformatted rounded off values)
Tracks per surface (total)			26 302 tracks (user accessible)
Tracks per inch			38 000 tpi
Peak bits per inch			460.00 KBpi
Internal data rate			530-674 Mbps (variable with zone)
Disc rotational speed			10 028 rpm (+0.5%)
Average rotational latency			2.99 ms
Access time
		Including controller overhead without disconnect		Not including controller overhead without disconnect
		Drive level		Drive level
		Read	Write	Read	Write
Average typical ms		5.4	6.4	5.2	6.2
Single track typical ms		0.7	1.1	0.5	0.9
Full stroke typical ms		10.2	11.2	10.0	11.0
Power			+5 VDC ±5% +12 VDC ±5%
Environmental characteristics		Operating		Non-operating
Relative humidity		5 to 95% non-condensing		5 to 95% non-condensing
Ambient temperature		5 to 55° C		–40 to 70° C
Effective altitude		–1 000 to 10 000 feet		–1 000 to 40 000 feet
Dimensions
Height			1.00 inches (25.4 mm)
Width			4.00 inches (101.6 mm)
Depth			5.75 inches (146.05 mm)
Weight			1.76 lbs. (0.798 kg)
Reliability			1 200 000 hour MTBF LSI circuitry Balanced low mass rotary voice coil actuator Incorporates industry-standard Self-Monitoring Analysis and Reporting Technology