Re: is there a dos command that works like xcopy but compares file sizes or last modified dates?
On Fri, 03 Sep 2010 20
1
5 -0400, mm <NOPSAMmm2005@bigfoot.com>
wrote:
>On Fri, 03 Sep 2010 156:00 -0700, Mike S <mscir@yahoo.com> wrote:
>
>>I use xcopy to backup large amounts of data from three different parent
>>folders to a 2nd hdd. It works great, but I would like to use a more
>>efficient method of only backing up files that are a different size,
>>have a different last modified date, or don't already exist, so no files
>>that haven't been modified since the last backup will be copied again.
>>Is there a DOS command similar to XCopy that will allow me to do this? I
>>like using DOS commands because they are fast.
>
>Don't know, but xxcopy at www.xxcopy.com has an enormous set of
>options, backward compatible with xcopy. It will do things you've
In case I wasn't clear XXCopy is free and runs in DOS or a DOSbox, and
I think in almost all cases it runs as fast as dos commands, except I
guess for every selection criterion, it has to do one more compare and
branch, but you can't get somethin' for nothin', right. If you use
the progress bar, that can slow things down a lot because it does two
passes, one to find out how much there is to copy and one to copy it.
He's working on starting the copy while the count is still going on,
or maybe he's finished that already. "He" is the author, who
frequently answers questions on the mailing list.
There is a clone option to xxcpy, which has all the options to make
sure the files on the copy are exactly the same as the files on the
original.
And there is also XXClone, which makes a file by file bootable copy of
the original partition. Not an image copy so that incremental
updates are easily done. Only the full copy version is free and the
other one with incremental and differential copies is 40 dollars iirc,
but other clone products don't have the ability, iiuc, to do that.
He can only restore to the original computer, it seems, while Acronis
True Value Home and some others can transfer a system to another
computer.
>never considered doing. It has its own yahool discussion list if
>there are questions.
>
>Free to non-commerical users and not that expensive elsewise (is that
>a word?)