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ND 310 Floppy Disk Drive, 308 Kbyte¶

INTRODUCTION¶

ND 310 Floppy Disk Drive is provided with:

A diskette clamping/registration design which eliminates the possibility of damage to the diskette due to misregistration.

A ceramic read/write head designed and manufactured by Shugart to provide media life exceeding 3.5 million passes/track with head life exceeding 15,000 hours, and an activity light which indicates drive in use.

FEATURES¶

Bottom and side mounting holes for ease of installation and maintenance
Ceramic read/write head
Side by side mounting in standard 48 cm RETMA rack
Die cast cartridge guide and base plate
Positive diskette clamping registration
Flexible interface with multiplex capability

PRODUCT DESCRIPTION¶

The ND 310 Floppy Disk Drive consists of:

Read/Write and Control Electronics
Drive Mechanism
Track Positioning Mechanism
Read/Write Head
Removable Diskette

These components perform the following functions:

Interpret and generate control signals
Move read/write head to the selected track
Read and write data

The Head Positioning Actuator positions the read/write head to the desired track on the diskette. The Head Load Solenoid loads the diskette against the read/write head and data may then be recorded or read from the diskette.

[Photo: Image of the ND 310 Floppy Disk Drive]

310-A1-6000-0881

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SPECIFICATIONS¶

Floppy Disk System¶

Model: Shugart SA800R

Media Storage¶

Temperature: 10 to 50°C

Unit Operating¶

Temperature: 15 to 32°C

Relative Humidity¶

Range: 20 to 80%

Vibration¶

Frequency: 5 to 300 Hz
Amplitude: 0.04 mm to 0.3 g

Recording Density¶

Density: 3200 bpi (6400 flux changes)

Wear¶

Description: Approximately 3.5 x 10⁶ passes/track with head in contact

Access Time¶

Description: Track to track: 8 ms/step plus 8 ms settling time

Rotational Speed¶

Speed: 360 rpm

Average Rotational Latency¶

Latency: 83 ms

Head Load Time¶

Time: 35 ms

Average Access Time for N Steps¶

Time: (8 · n + 8 + 83 + 35) ms = (8 · n + 126) ms

Transfer Rate To/From Buffer¶

Rate: 31.25 Kbytes/second

Data Capacity¶

Format	Sectors/Track	Bytes/Sector	Bytes/Diskette
IBM 3740 format	26	128	256256
IBM 3600 format	15	256	296580
ND format and IBM S/32 II	8	512	315392 (156 pages total)

All diskettes have 77 tracks.

      _                                    
   __| |   Norsk Data                      
  / _` |                                   
 | (_| |                                   
  \__,_|

      _                                    
   __| |   Comtec                           
  / _` |                                   
 | (_| |                                   
  \__,_|

NOTE: NORSK DATA reserves the right to change specifications without given notice!