I have been struggling with _disklabel_ to write boot code to an 
RZ24 drive. After studying some examples in /etc/disktab , I had laid out 
something that would correspond with the entry in /etc/disktab:

(/dev/sd0)a: 224/0/0 0/0/0 4.2BSD 1024 8192 16
(/dev/sd0)b: 224/0/0 224/0/0 swap
(/dev/sd0)c: 900/0/0 448/0/0 4.2BSD 1024 8192 16
	
I had some boot code that I received either from Marc Malagelada or
Bertram Barth that worked when I had imaged it onto an RX23 floppy
(1440KB) and booted from 'dka500'. I had named that VS3KBOOT.BIN and tried
the following: 

disklabel -w -B /dev/sd0a -b VS3KBOOT.BIN RZ24

'disklabel: /dev/sd0a: Device not configured' was the result.

I repeated the same thing using /dev/sd0c and it worked.

>From what I understand at present, would not the boot code reside on 
/dev/sd0a?

Paul Apprich