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pkzip large files

I have a file ~ 4gb that i need to zip and copy to another server.  i have done this for quite sometime using pkzip with a batch file.  it runs every evening when traffic is light.  now the process is failing.  I presume it is because the file is larger now.  This is the error I'm getting...
PKZIP: (W02) Warning! can't open: FileName

Any suggestions on how I can continue to do this.  Without zipping first it takes 2 hours to copy!!
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Fraser_Admin
Asked:
Fraser_Admin
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8 Solutions
 
Adam LeinssCommented:
What about using 7Zip command line version: http://www.7-zip.org/download.html?
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Danny ChildIT ManagerCommented:
That error may indicate that the file is in use - often this is caused by backup programs.  You can also check using Computer Management.
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Danny ChildIT ManagerCommented:
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sah18Commented:
I agree with DanCh99's comment that the file may actually be in use from the message you are getting.  Though, since this was never an issue in the past, I wonder why that would change now.  It seems that either the file is actively in use, or that it is not being released properly when no longer in use.  Can you provide more details as to what kind of file this is, and what it is used by?  That may help to narrow down the problem.

Also, I personally have used 7Zip command line before (recommended by aleinss above) and it's a wonderful tool.  Though, if the problem really is that the file is in use, this too would fail.  We really need to figure that out first.

I'd recommend manually trying to run the command.  If it fails, I'd recommend trying to do a simple copy on that file (again manually) to see if that succeeds.  You may receive some different errors that might point you in the right direction.

Please post back.
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Steve KnightIT ConsultancyCommented:
pkzip (at least originally) did have a 4Gb limit as it used 4 bytes to store the file size I seem to remember..... couldn't imagine we'd ever get a file that big as we zipped files to fit on a 360K floppy disc :-)  Various support for bigger files since then but I'll third 7zip .... surely we can't need files that are > 16,000,000,000 GB !!

Steve
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Fraser_AdminAuthor Commented:
It is an sql server 2005 backup.  I have never had this issue before the last week and this has been running for over 2 years.  Now it fails everyday.  

i have never used 7zip.  is it a free ultilty?  i will check out the website.
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Adam LeinssCommented:
Yes, it's free and unrestricted in private/commercial institutions.
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Steve KnightIT ConsultancyCommented:
also what drive is it being zipped onto.... Is it NTFS formatted or a external FAT32 drive for instance..... i know unlikely but better check.

Check the pkzip version no. And we can see whether that does over 4gb files or try the 7zip.

steve
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SnibborgCommented:
Don't forget you have the option to break down the single file into a series of smaller zip files that extract into a single file when needed.

Snibborg
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Fraser_AdminAuthor Commented:
7zip utility seems to work great!! thanx
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