Date   : Mon, 13 Feb 2006 11:45:17 +0000
From   : Jules Richardson <julesrichardsonuk@...>
Subject: Re: Watford / Acorn DFS question

Mike Tomlinson wrote:
> In article <43EF888E.2020701@...>, Jules Richardson <julesrichar
> dsonuk@...> writes
>> Hmm, how do I tell the difference between a Watford DFS disk of less than 
>> 256KB and an Acorn DFS one?
> 
> Unless I've misunderstood your question, Watford disks have two
> catalogues if formatted with 62 files - otherwise they look just like
> Acorn discs.

Ahhh, OK - so:

If it's got a second catalogue it's a Watford disk and also supports longer 
files (by optionally setting the high bit in byte 5 of the filename).

If there's no second catalogue, it's just a standard Acorn-compatible DFS 
disk, with no longer file support.


(I'm primarily using JGH's DFS format page - which suggests that the second 
catalogue is optional on Watford disks. If it's mandatory then that means I 
*can* differentiate between a Watford and Acorn disk, making life a bit 
easier! :-)

cheers

Jules