• Please review our updated Terms and Rules here
  • Exhibitor application for VCF West 2022 is now open! If you are interested in exhibiting, please fill out the form here.

RMS 518 harddisk, technical data

Roland Huisman

Veteran Member
Joined
Mar 24, 2011
Messages
1,340
Location
The Netherlands
Well let's ask the MS-DOS guys too :D

Does anyone know the RMS 518 Hard disk? It is a 5.25 Full Height
MFM drive. So they might be used in MS-dos systems also.
I need to find a similar hard disk. But I do not now the technical data.

HD2.jpgHD1.jpg

With a little help from Fred Jan I've got some other RMS disk data.

Disk format (H CYL S)
RMS 503 => 2 153 17 2.6MB
RMS 506 => 4 153 17 5.2MB
RMS 512 => 8 153 17 10.4MB
RMS 514 => 4 338 17 11.5MB
RMS 518 => STILL UNKNOWN

All these drives are 17 sector drives.

The Xebec controller is jumpered to 256 Byte / 32 sector according the Xebec documentation.
I wonder, is the drive "misused" with a slightly different data amount per track?
(It that possible anyway?) Or is it really a 32 sector drive?

Counting protection wires and diodes tells me it's probably an 8 head drive.
But still I have no clue about further technical data.
I really wonder is anyone knows this disk...

Thanks in advance!

Regards, Roland

Same question at CP/M treath: http://www.vintage-computer.com/vcforum/showthread.php?36431-Identify-harddisk-and-controller
 
Last edited:
Top