Problem with extracting files from ZIP archive.

June 14, 2016 at 10:36:00
Specs: Windows 7
Need help restoring backup files which were created by genie backup manager software.
I have lost some of the sequential files in the overall backup sequence.
The software vendor knowledge base claims that the almost 2-gig backup files are really
a zip file and should be able to unzip with any winzip type utility.
Problem and a question is: I get the zip files, unzip them and all files come out great but with
an extra extension. For example document.doc gets extracted as document.doc.genc file.
I rename the file to document.doc and even though the file size, creation date is fine the
file is unreadable. This applies to all files extracted this way. anyone had any experience with this?
Or what is a good zip un-corrupt utility out there?


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#1
June 14, 2016 at 13:11:18
I am not a compression expert, nor do I use Genie Backup,
but:

This is from the Genie Backup Manual, page 13.
PDF found here:

https://www.genie9.com/Business/gen...

Compression in Genie Backup Manager
Genie Backup Manager uses non-proprietary ZIP64 compatible compression to reduce backed up data size and save space

This is from Wiki:

ZIP64

The original .ZIP format had a 4 GiB limit on various things (uncompressed size of a file, compressed size of a file and total size of the archive), as well as a limit of 65535 entries in a .ZIP archive. In version 4.5 of the specification (which is not the same as v4.5 of any particular tool), PKWARE introduced the "ZIP64" format extensions to get around these limitations, ....

With all that being said, I do know that 7Zip as well as PKWARE both support the ZIP64 standard, so you might want to give either of them a try, and see what their respective manual have to say about unzipping a ZIP64 archive.
There may be a specific option required.

Good luck

MIKE

http://www.skeptic.com/


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#2
June 14, 2016 at 13:28:48
Extracting from the archive is not the problem. The problem appears to be the backup program itself, which encrypts the files before zipping them. Someone somewhere probably has a utility to convert *.genc files back to their unencrypted originals. Try asking on the Genie Backup support forums.

How To Ask Questions The Smart Way


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#3
June 14, 2016 at 19:13:33
Agreeing to #2.
I've never used Genie Backup too, but all I know is, if it did the encryption, then it is the only one which can do the decryption.

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Related Solutions

#4
June 15, 2016 at 03:38:03
Re #4
The file, when renamed to .doc, does not work. This has been mentioned before.

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#5
June 15, 2016 at 04:34:36
"Or what is a good zip un-corrupt utility out there?"

Never had to use any of these.

B1 Free Archiver
http://www.softpedia.com/get/Compre...
http://b1.org/
"In addition, you can create a separate archive for each folder, test the integrity of an archive or repair broken or corrupted ones, as well as open files in an external viewer or editor"

File Repair
http://www.softpedia.com/get/System...
http://i1-win.softpedia-static.com/...
http://www.filerepair1.com/
"File Repair supports different file formats, such as DOC, DOCX, RTF, XLS, XLA, ZIP, RAR, AVI, MP4, MOV, MPG, JPEG, GIF, TIFF, BMP, PNG, PDF, MDB, MDE, PPT, PPS, MP3, WAV, and others too"

Ashampoo Zip Free
http://www.softpedia.com/get/Compre...
http://www.freewarefiles.com/Ashamp...
http://www.freewarefiles.com/screen...
https://www.ashampoo.com/en/aud/pin...
"Additional features enables it to repair damaged or corrupt archive files"

Zipfocus
http://www.softpedia.com/get/Compre...
http://www.cathonian.com/software/z...
"Effortlessly extract archives and restore damaged or corrupted backup files with this small, but very powerful software solution.
Zipfocus is a lightweight, but powerful utility that enables you to decompress, compress and test archives for any damage or corruption"


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#6
June 15, 2016 at 06:11:11
I use verification with my backups but I only occasionally do a complete backup and not incremental.

There may be a glimmer of hope for you. I found this online:
https://www.quora.com/How-can-I-res...


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