RX50 dual-diskette drive

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Manufacturer: DEC
Capacity: 400 KB (per floppy)
Transfer Rate: 250K bits/sec
Average Access Time: 164 msec
Revolutions per Minute: 300
1/2 Revolution Time: 100 msec
One Track Seek Time: 6 msec
Total Surfaces: 1 (2 floppies per RX50)
Number of Heads: 1 (per floppy)
Tracks per Surface: 80 (per floppy)
Sectors per Track: 10 (soft)
Bytes per Sector: 512
Tracks per Inch: 96
Density: 5576 flux changes/inch
Recording Method: MFM
Start Time: 500 msec
Physical Size: 3.25" x 5.75" x 8.5"
Weight: 4.8 lb
Power Consumption: 4.2W (idle)
17.5W (active)


The RX50 dual-diskette drive is a 5.25" full height floppy disk drive from DEC. It uses MFM encoding, and holds 400 KB per floppy.

It is supported by the following DEC QBUS MFM disk controllers:

There are two controllers for other buses:

The DEC order number for RX50 floppies is RX50K.

4.3 BSD disktab

rx50|RX50|DEC RX50:\

External links