MILPER‘s MRDC, are rugged, high capacity disk drive designed for use as plug-in unit into MILPER‘s MRMEU-109, enclosure, customer‘s enclosure or any other removable mass storage application. The MRDC-2000 stores up to 2148 Megabytes of formatted data (2537 Megabytes of unformatted data).

The unit has an average random seek of 12.6 msec. The MRDC-9000 stores up to 9100 Megabytes of formatted data (11700 Megabytes of unformatted data). The unit has an average random seek of 10 msec.

Ruggedized for operation in severe environments - where extreme temperatures, shock, vibration, humidity and air pressure are common - the MRDC-2000 & 9000 are field proven in ‘‘on-the-move‘‘ operation in tracked and wheeled vehicles, as well as airborne application. Since no warm up time is required, near instant readiness is provided at all operating temperatures.

The sealed, cast aluminum housing encompasses the entire drive mechanism, including electronics, isolating the drive from shock and vibration and protecting it from high humidity and changes in altitude. An embedded digital servo system automatically compensates for temperature variation, ensuring accurate, reliable head positioning over the entire operating temperatures range.

To prevent damage during handling and transport, the heads are automatically parked and secured by a locking mechanism when power is removed.

MRDC-2000 MRDC-9000
Capacity
Unformatted 2537 11700 MB
Formatted 2148 9100 MB

Seek Time
Track to Track 1 0.8 msec.
Average Random 105 105 msec.
Maximum 22 19.2 msec.

Rotational Latency
Average 5.54 4.17 msec.
Normal Maximum 11.1 0.8 msec.
Spindle Speed 5411 7200 msec.

Data Transfer Speed
Internal Data Rate 26.8 - 45.6 80 - 124 Mbits/sec.
External Transfer Rate Synchronous Up to 10 Up to 20 MB/sec..

Temperature
Operating: -18 - +55° C
Intermittent: -20 - +65°C
Non Operating: -30 - +71° C

Humidity
Operating/Storage MIL-STD-810E, 100%RH

Vibrations
Operating: Sinusoidal 4g, 5-200Hz.
Random, MIL-STD-810E,
Method 514.4
Non Operating: Sinusoidal 6g, 5-200Hz.
Shock
Operating: 10g, 11 msec. half sine.
Non Operating: 50g, 11 msec. half sine.
EMI/RFI MIL-STD-461, Class 3
Altitude

Operating
Operating:30,000 ft.
Non Operating:40,000 ft.