zip file size limitation when using dump mode?

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zip file size limitation when using dump mode?

Postby ewarman » Tue, 24 Aug 2004, 04:44

I have been using nnbackup 2.2.7 in dump mode on windows 2000 to backup large filesystems(10+ GB). The largest zip file that the dump creates is about 2 gigabytes in size. Both the source and destination directories are NTFS, so it should be able to handle files larger than 2GB. Is this a limitation in the zlib library? Has anyone else seen this behavior with nnbackup?

Invoked with:
nnbackup dump 0 -ci -i source -o dst -s -e -c -v -dn "0" -log c:\batches\logs\backup.txt

Any insights to this is appreciated. TIA.
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Postby VK » Tue, 24 Aug 2004, 10:18

Yes. This is a known limitation of currently available zip libraries. This is mentioned in nnBackup docs ("Working with nnBackup - Working modes - Incremental Backup (Dump)"). Here is the link: http://www.nncron.ru/nnbackup/help/EN/w ... s/dump.htm

Try the '-nozip' command line option to cancel packaging dumps in zip-archives. This will allow you to use incremental backups even when you have to backup very large amounts of information.
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Re: zip file size limitation when using dump mode?

Postby zlatan24 » Sat, 27 Jun 2009, 18:41

In my understanding way out of this situation this is-corrupted zip folder,because when I was in like condition I choose it,software has free status as is known,it recovers information from damaged zip files and minimizes data loss during the zip recovery process,use of multiple algorithms allows the program to minimize data loss during zip recovery, therefore the user sees as much as possible about the files being recovered,will have to enter the password when prompted and the application will make a fix zip file attempt using the specified password,program supports Windows 98, Windows Me, Windows NT 4.0, Windows 2000, Windows XP, Windows XP SP2, Windows 2003 and Windows Vista,solve problem with fix the Cannot open file: it does not appear to be a valid archive in ZIP archive error.
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Re: zip file size limitation when using dump mode?

Postby zlatan24 » Tue, 28 Jul 2009, 20:08

VK wrote:Yes. This is a known limitation of currently available zip libraries. This is mentioned in nnBackup docs ("Working with nnBackup - Working modes - Incremental Backup (Dump)"). Here is the link: http://www.nncron.ru/nnbackup/help/EN/w ... s/dump.htm

Try the '-nozip' command line option to cancel packaging dumps in zip-archives. This will allow you to use incremental backups even when you have to backup very large amounts of information.

For work with zip files I recommend to use-invalid or corrupt zip file.Tool is free as far as I know,it helped two friends several months ago.Besides that utility has many facilities,such as it will open your file with *.zip extension or SFX self-extracting archive and analyze compressed documents.Tool helped me quite good and my friends were enjoyed about it.
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Re: zip file size limitation when using dump mode?

Postby zlatan24 » Mon, 07 Dec 2009, 15:48

ewarman wrote:I have been using nnbackup 2.2.7 in dump mode on windows 2000 to backup large filesystems(10+ GB). The largest zip file that the dump creates is about 2 gigabytes in size. Both the source and destination directories are NTFS, so it should be able to handle files larger than 2GB. Is this a limitation in the zlib library? Has anyone else seen this behavior with nnbackup?

Invoked with:
nnbackup dump 0 -ci -i source -o dst -s -e -c -v -dn "0" -log c:\batches\logs\backup.txt

Any insights to this is appreciated. TIA.

Today I downloaded a film in zip file and wanted to watch it,but I couldn't because it was damaged.A friend advised me next tool-corrupted program recovery zip.To my surprise utility helped me very easy and free of cost.Besides software showed how it can encounter problems with this application and corrupted files with *.zip extension.
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Re: zip file size limitation when using dump mode?

Postby Luzagodom » Fri, 02 Jul 2010, 04:27

Try the '-nozip' command line option to cancel packaging dumps in zip-archives.
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Re: zip file size limitation when using dump mode?

Postby zlatan24 » Wed, 21 Jul 2010, 16:25

Luzagodom wrote:Try the '-nozip' command line option to cancel packaging dumps in zip-archives.

This morning I have downloaded some zip archives with film inside. But unfortunately these files were crashed. I decided to use the Google and found out - Fix zip file. It worked out my proposition within the scope of a minute. Above I knew how the utility recovered information from damaged zip files and minimized data loss during the zip recovery process.
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