Date   : Tue, 20 Jul 2010 11:28:13 +0000 (GMT)
From   : peterdengland@... (peterdengland@...)
Subject: ADFS Broken Chain - BBC Model B

Thanks very much for your fast response Rob.
I need to get a CF card and, I guess, a CF card reader/writer for the PC would 
be wise.

Peter


________________________________
From: Rob <robert@...>
To: peterdengland@...
Cc: bbc-micro@...
Sent: Tue, 20 July, 2010 12:49:51
Subject: Re: [BBC-Micro] ADFS Broken Chain - BBC Model B

On 20 July 2010 11:15,? <peterdengland@...> wrote:
> I have a BBC Model B wiith RetroClinic DataCentre
>
> I have a "broken directory".
> I have written a load of stuff on the CF Hard Drive, and really would like
> to recover it, rather than reformat the hard drive and lose it. Needless to
> say it is not all backed up.
>
> Has anyone written a program to fix broken directories, or know how to fix
> them manually (I have ADT installed).
>

From: http://mdfs.net/Docs/Comp/Disk/Format/ADFS

"A directory is reported as 'Broken' if the Master Sequence Number and "Hugo"
strings do not match - bytes 000-004 are compared with bytes 4FA-4FE."


I would suggest the first approach is to patch those bytes to be the
same.? Hopefully that should get you access to the directory, in which
case, backup everything immediately - do not treat the disc as safe to
write to.? Then format up a new CF card and restore everything - once
you are happy you have got everything across you can re-format the old
card..

Rob