Difference between revisions of "RL02 disk drive"
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| tracks per inch = 250 | | tracks per inch = 250 | ||
| density = 3725 bpi (maximum) | | density = 3725 bpi (maximum) | ||
| − | | recording method = [[Modified | + | | recording method = [[Modified Frequency Modulation]] (MFM) |
| start time = 40 seconds | | start time = 40 seconds | ||
| stop time = 30 seconds | | stop time = 30 seconds | ||
Revision as of 14:51, 18 October 2017
| RL02 | |
| Manufacturer: | Digital Equipment Corporation |
|---|---|
| Drive Controller(s): | RL11 (UNIBUS) |
| Capacity: | 10.4 Mbytes (formatted) |
| Transfer Rate: | 512 Kbytes/sec 3.9 usec/word (peak) |
| Average Access Time: | 67.5 msec |
| Revolutions per Minute: | 2400 |
| 1/2 Revolution Time: | 12.5 msec |
| One Track Seek Time: | 15 msec |
| Average Seek Time: | 55 msec |
| Maximum Seek Time: | 100 msec |
| Head Switching Time: | 8 msec (maximum) |
| Total Surfaces: | 2 |
| Tracks per Surface: | 512 |
| Sectors per Track: | 40 |
| Words per Sector: | 128 |
| Tracks per Inch: | 250 |
| Density: | 3725 bpi (maximum) |
| Recording Method: | Modified Frequency Modulation (MFM) |
| Start Time: | 40 seconds |
| Stop Time: | 30 seconds |
| Physical Size: | 19" W x 10-1/2" H x 25" L |
| Weight: | 55 pounds |
| Power Consumption: | 160VA (running); 550 VA (starting, 10 seconds) |
The RL02 is the high-density version of the RL01 disk drive, with twice as many tracks per surface, introduced in 1978 by DEC.
The QBUS controllers are the RLV11 and RLV12, the latter being the Q22 version.
4.3 BSD disktab
rb02|RB02|DEC RL02 on 730 IDC:\ :ty=removable:se#256:ns#40:nt#2:nc#32:\ :pa#15884:ba#4096:fa#1024:\ :pb#4480:pc#20480:
Emulating the RL02
Reinhard Heuberger has created an open source emulator for the RL02 (and RL01) using a Terasic DE0-Nano Altera Cyclone IV FPGA board, extended with necessary interfacing hardware and an SD card slot. The emulator can be used with a real PDP-11, for example.
* Home page of project * Picture of the simulator connected to a PDP-11/53
