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ND 572/579 – 150 Mbyte Disk Drive
INTRODUCTION
The ND 572/579 – 150 Mbyte Disk Drive is a random-access storage device. It uses fixed, sealed modules as the storage medium.
The ND 572/579 is designed for applications which demand high reliability and low maintenance. A sealed module protects the entire recording environment from external contaminants. The fixed media concept significantly improves device reliability and eliminates the need for costly head alignments. In addition, drive unit circuitry is easily accessible for fast troubleshooting.
FEATURES
- No scheduled maintenance required
- Fixed, sealed media
- Write protect
- Power sequencing (local and remote)
- Power supply
- Flat input/output cable
- Variable or fixed sectoring
- Phase-locked oscillator (PLO)/data separator
- PRZ to MFM data encoder with write compensation
- Prewired for dual channel field kit
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PRODUCT DESCRIPTION
The Mini-Module Drive is a 3600 rpm, 9.677 MHz data rate, random-access, fixed-media device consisting of a drive motor and brake, power supply, logic package, and disk module, all contained within a metal enclosure. The logic package contains electronic printed circuit boards with read/write, fault, transmitter/receiver and microprocessor controlled servo electronics. The disk module contains the disk, heads actuator, and air filters and is sealed to minimize the effects of environmental contamination. Several features to enhance system integrity are included. They are phase-locked data separation, NRZ-to-MFM data conversion and daisy-chain interface capability.
SPECIFICATIONS
| Description |
Value |
| Eight-bit bytes/spindle |
165 M |
| Optional fixed heads-per-track |
0.96/1.93 M |
| (bytes/spindle) |
|
| Cylinders/drive |
823 |
| Bytes/track |
20,160 |
| Bytes/cylinder |
201,600 |
| Data heads/surface |
2 |
| Optional fixed heads-per-track |
48/96 |
| Data surface |
5 |
| Disks |
4 |
| Servo and head-per-track surface |
2 |
| Track density (tracks/in) |
680 |
| Description |
Value |
| Data transfer rate (Bytes/sec) |
1.2 MB/s |
| Spindle speed |
3600 r/min |
| Bit density |
6417 bpi |
|
(inner radius) |
| Start/stop time |
30 s |
| Positioning time |
|
| Maximum full stroke |
55 ms |
| Average |
30 ms |
| Minimum (one track) |
7 ms |
| Latency time: |
|
| Maximum |
17.3 ms |
| Average |
8.3 ms |
| Media |
356 mm diameter, |
|
magnetic-oxide |
|
coated, lubricated |
| Heads |
Contact during |
|
start/stop |
Power Requirements
| Description |
Value |
| Frequency |
50 Hz |
| Voltage |
220 and 240 |
| Phase |
Single |
| Maximum inrush current |
(rms) 14A |
| Power input (max) |
600 W |
| Input power con |
Nema, type 5-15 P |
|
for 110 V, 60 Hz |
Physical Characteristics
| Description |
Value |
| Height |
259.1 mm |
| Width |
425.5 mm, fits |
|
482.6 mm rack |
| Depth |
765 mm |
| Weight |
56.6 kg |
Environmental
| Description |
Value |
| Operating temperature |
+10°C to +40°C |
| Operating humidity |
20 to 80% RH |
Reliability and Service
| Description |
Value |
| MTBF |
8000 hours |
| MTTR |
Less than 1.0 hour |
| Service life |
5 years |
| Data error rate |
Recoverable: |
|
Not more than one |
|
error in 10^10 bits |
|
transferred |
Maintenance
No scheduled maintenance required other than periodic cleaning of coarse filter or replacement
Maintenance Features
- No head alignment required
- No read/write adjustments
- Fault trap indicators to isolate problems quickly
- Field test unit available for off-line maintenance
- Module is easily removed as a sealed unit
- Functionally organized logic modules with easy access
Operator Control Panel
- Ready indicator
- Fault clear switch with fault status indicator
Interface Hardware
| Description |
Details |
| I/O circuits |
Industry standard 75110 differential line drivers or equivalent. |
|
Industry standard 75108 differential line receivers or equivalent. |
| I/O connectors |
«A» cable (60 pin), Berg part 65043-12. |
|
«B» cable (26 pin), 3 M part 3999-3000. |
| «A» cable |
30 twisted pair, flat cable, 100 (± 10) ohms characteristic impedance, 30.5 m accumulative maximum length. Used in daisy-chain mode. Spectra strip 3CT-6028-7B-05-100. |
| «B» cable |
26 conductor, flat cable with ground plane, 160 (± 16) ohms characteristic impedance, 15.2 m maximum length, 3M part 3476/26. Used in radial modes as unit cable. |
| Description |
Value |
| Maximum media errors |
250 |
| Fixed heads-per-track |
Media error free |
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| |
| NND |
| |
| ND |
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| |
| Trondheim: tel. 075-16250, tk. 55580 cont0ve |
| Stockholm (Upplands Vasby): tel. 867-9006, tk. 13528 nordska |
| Stockholm (Solna): tel. 729-2564, tk. 13796 svecom 3 |
| Bergen: tel. 95298, tk. 91117 |
| Dissofdor: tel. 211-660483, tk. 858727 comt od |
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Note: NORSK DATA reserves the right to change specifications without prior notice!