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Number   :  2603
Date     :  2002-08-04
Author   :  Kan Yabumoto
Subject  :  Re: Using XXCOPY to Emulate RAID System?
Size(KB) :  3



To automate various volume/directory synchronization
jobs (backup operations), it is probably easiest if
you create a batch file first (with one or more
XXCOPY command lines). Then, place its shortcut icon
into the "Scheduled Task" (inside Control Panel)
where you can control the interval, permission, etc.

Furthermore, I like to run such an automated script
at the beginning of the day rather than running it
before you end your day. The two are nearly the same
but you need not wait for the backup operation to be
completed (which may take just a few minutes to a
much more time consuming operations --- depending on
the situation).

You may add a few timing-related switch to
XXCOPY command to adjust the timing. For example,
I usually add the /NI switch to deliberately reduce
XXCOPY's demand for the CPU time. E.g., /NI500
will insert an 0.5 second idle period between file
copies to prevent the XXCOPY background job from
slowing down the system response time to your
regular operation. At the same time, you can monitor
the progress (and when something funny happen, you
will notice it). You have to experiment the /NI
parameter value to suit your taste.

As to the "particular day", you may use the recently-
added macro feature with /$WWW$ or /$W$ which
translate to day-of-the-week value (SUN, MON, TUE, ...
for /$WWW$, or 0..6 for /$W$) which can be used
as the destination directory name. If you use this,
you will end up with a set of seven unique
destination directories where you save seven
previous day's backup.

Lastly, the /CLONE switch may be the simplest one
to use for directory synchronization jobs ---
in conjunction with more switches.

>P.S. If this has been addressed before I will
>appreciate info on where I can access the answers.

You should search the archived messages by
keywords (either at the XXCOPY discussion group's
home page, or at the beginning of the XXCOPY
web page).

Kan Yabumoto
===================================================

At 2002-08-04 13:15, you wrote:
>Hello,
>I'm new to the XXCOPY forum so I apologize if these
>questions have been answered before.
>In a dual IDE hard drive system, master/slave
>configuration, can XXCOPY be used to emulate a RAID
>system? By that I mean that XXCOPY would be made to
>run, perhaps from a macro operating in the background,
>to continually upgrade the contents of the "slave"
>while the main processor made changes to the "master?"
>If not in a real-time basis, can XXCOPY be used at the
>end of a computer session, through a software switch,
>to update the "slave" from the "master?"
>Lastly, if the "slave" is installed in a mobile rack
>mounted in the front of the CPU, can it be removed
>from the CPU and "hot-connected" for upgrade by XXCOPY
>by running XXCOPY to copy all changed files for that
>particular day?
>My system is Windows XP.
>Thanks to any and all replies to my questions.
>Have a nice day.
>Marvin Weiss
>
>P.S. If this has been addressed before I will
>appreciate info on where I can access the answers.



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