NEC POWERMATE PROFESSIONAL 9000E - SERVICE, Руководство по обслуживанию, Страница: 159 / 206

Specifications 10-7
Hard Drive
The following specifications apply to the hard drives available with the system.
Note:
Hard drives in PowerMate Professional 9000E
Series computers are subject to change according to
availability, and as technologies evolve. The system may
have a different hard drive than those listed in this section.
8.4-GB IBM Hard Drive Specifications
The specifications for the 8.4-GB IBM DHEA-38451 hard drive are included in
the following table.
8.4-GB IBM DHEA Hard Drive Specifications
Feature Specification
Hard Drive 8.4-GB IBM DHEA-38451
Formatted Capacity
Nominal Rotational Speed
Number of Disks
Number of R/W Heads 8400 MB
5,400 rpm
4
8
Sectors Sectors per drive: 16,514,064
Bytes per sector: 512
Recording Recording technology: Multiple Zone
Density: 162.6 Kbpi (max.)
Track density: 10700 tpi
Maximum effective areal density: 1747 Mbits/in
2
Performance Seek time: 9.5 msec (read)
Media transfer rates: 76.2 to 127.4 MB per second
Interface transfer rate: 33.3 MB per second (max.)
Buffer Size 472 KB
Power +5V +/-5%; 100 mV peak-to-peak allowable ripple/noise
12V +/-10%; 150 mV peak-to-peak allowable
ripple/noise
Temperature (non-condensing)
Operating: 5
°
to 55
°
C (41
°
to 131
°
F)
Non-operating: -40
°
to 65
°
C (-40
°
to 149
°
F)
Humidity (non-condensing)
Operating: 5% to 85% rh, 30
°
C (86
°
F)
Non-operating: 5% to 95% rh, 40
°
C (104
°
F)
Altitude Operating: -300 m to 3,048 m (-650 to 10,000 ft.)
Non-operating: -300 m to 12,000 m (-650 to 40,000 ft.)
Dimensions Height: 1.0 inches (25.4 mm)
Width: 4.0 inches (101.6 mm)
Depth: 5.75 inches (146.1 mm)
Weight 1.2 lbs (0.5 Kg)