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Number   :  9133
Date     :  2004-11-04
Author   :  Garry Deane
Subject  :  Re: Reducing disk space Backup requirement
Size(KB) :  1



--- In xxcopy@yahoogroups.com, "rgen248x"  wrote:
> 
> I have used XXCOPY successfully for a few years and I am
> quite happy with it. I run Windows 98 on a Compaq Computer.
> I recently started using the USB memory disks. The size of
> my disks (128 mb) is to some extent limiting and I found that
> I needed free space at least as large as any file I wanted
> to refresh. I looked for a command to delete a file before
> the new version but can not find this command. I ended up
> using the /CK0 command and it seems to work. Any comments
> or concerns? I use the following command string.
> " /AC/BI/H/Q/Q2/R/ZY/YY/ZS/D" 
> Bob G

/CK0 should do the job fine although if you are close to the
dest capacity, you might still run into problems when files
are going to be deleted but haven't been deleted before new or
larger files are added. If you want, you can run a separate
xxcopy command which deletes all files which are about to be
deleted or updated then run the xxcopy command to add or
update new files. The command would be:

xxcopy \usbdrive\ \src\ /rsy/bo/s/h/r/pd0

This will delete files on the usbdrive which don't exist in
the source or are older than the files in the source. If
you prefer, you could leave the older files in place and
just delete the extra files by using /bb instead of /bo.
As to your existing command, here's a few comments:

/AC - OK
/BI/D - OK but can use /BN instead (copy new or newer)
/Q/Q2 - The rightmost /Q2 command has priority so don't need /Q
/H/R - OK
/ZY - Won't be needed if using previous clean up command first
/YY - OK although I prefer to use the specific prompt controls.
Also, if you use the previous clean up command, this won't be
needed as there'll be no prompts.
/ZS - OK

/S - You'll need this if you want to process subdirectories

Garry



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