ID-ing a PC backup format

[Alexander Schreiber]

On Wed, Nov 04, 2015 at 05:35:51PM -0800, Chuck Guzis wrote:
> I've got a set of mystery 5.25" DD floppies that appear to be a
> backup of some sort.  10 x 512 byte sectors per track, 40 cylinders,
> double-sided. Normal sector IDs (Side 0: 0/ Side 1: 1), 1-10.
> 
> No, it's not FASTBACK nor does it appear to be Central Point's PC
> Backup.  The start of the first sector of the first floppy looks
> like this:
> 
> 000000  50 43 42 41 43 4B 55 50-2E 01 00 50 43 42 00 06
> 000010  04 00 69 00 00 00 00 00-00 00 00 00 00 00 00 00
> 000020  00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00
> 000030  00 00 00 00 00 00 00 00-00 00 00 00 01 01 01 01
> 000040  01 01 01 01 01 01 01 01-01 01 01 01 01 01 01 01
> 000050  01 01 01 01 01 01 01 01-01 01 01 01 01 01 01 01
> 000060  01 01 01 01 01 5A 5A 5A-5A 5A 5A 5A 5A 5A 5A 5A
> 000070  5A 5A 5A 5A 5A 5A 5A 5A-5A 5A 5A 5A 5A 5A 5A 5A
> 000080  5A 5A 5A 5A 5A 5A 5A 5A-5A 5A 5A 5A 5A 52 13 C5
> 000090  9A 01 00 1E 00 01 00 54-55 52 42 4F 43 5C 00 00
> 
> Note that it starts off with 'PCBACKUP'.  This doesn't seem to match
> anything in my library.  Anyone got any ideas.
> 
> Oh yeah, this would be circa 1989 or so.

That sounds like the pcbackup program from the PC Tools suite from
Central Point.

http://www.oldskool.org/guides/dosbackupshootout includes at the
bottom a link to PC Tols 6:
http://www.oldskool.org/guides/dosbackupshootout/Central%20Point%20PC%20Tools.rar

Kind regards,
           Alex.
-- 
"Opportunity is missed by most people because it is dressed in overalls and
 looks like work."                                      -- Thomas A. Edison