Configuration
Interface	Ultra320 / Ultra160 SCSI
Capacity (GB)	18.3
Sector size (bytes)	512-528 (variable 2 byte inc.)
Recording zones	15
Data heads (physical)	12/6/3/2
Data disks	6/3/2/1
Max. areal density (Mbits/sq. inch)	26 263
Max. recording density (BPI)	548 000
Track density (TPI)	47 900
Performance
Data buffer	8192 KB
Rotational speed (rpm)	10 000
Latency average (ms)	3.00
Media transfer rate (max. Mbits/sec)	433 - 825
Interface transfer rate (max. MB/sec)	320
Sustained data rate (MB/sec)	33.8 - 66.7
Seek time (read typical)
Average (ms)	4.7
Track to track (ms)	0.5
Full track (ms)	10.5
Reliability
Error rate (non-recoverable)	10 in 10E16 bits read
Start/stops (at 40° C)	50K
Acoustic
Idle - Typical (Bels)	3.7/3.4/3.4/3.4
Operating - Typical (Bels)	4.5/4.5/4.5/4.5
Power
Requirement	+5VDC (+-5%) +12 VDC (+-5%)
Dissipation
Startup current (max. peak)	1.07A (5V) 2.40A (12V)
Idle (W)	10.2/7.7/7.0/5.9
Power consumption efficiency index	0.07 W/GB 0.11 W/GB 0.19 W/GB 0.33 W/GB
Dimensions
Height (mm)	25.4 (+-0.4)
Width (mm)	101.6 (+-0.4)
Depth (mm)	146 (+-0.6)
Weight (max. kg)	0.78
Environmental characteristics
Operating
Ambient temperature	5° to 55° C
Relative humidity (non-condensing)	8% to 90%
Max. wet bulb (non-condensing)	29.4° C
Shock (half sine wave)	10G (11 ms) / 45G (2 ms)
Random Vibration (RMS)	0.67G for horizontal 0.56G for vertical
Non-operating
Ambient temperature	-40° to 65° C
Relative humidity (non-condensing)	5% to 95%
Max. wet bulb (non-condensing)	35° C
Shock (half sine wave)	75G (11 ms) / 225G (2 ms) for 146GB 300G (2 ms) for 73 36 and 18GB
Random Vibration (RMS)	1.04G