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Work-around for large image files to ISO?

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N Plant
2011-03-03
2013-04-05
  • N Plant

    N Plant - 2011-03-03

    I have a 20GB partition that I need to image and create a recovery disc.  No matter what compression I use, the resulting image file is more than 4.5GB (smallest I could get it was about 7.5).  When I try to create an ISO for this image, it fails.  The partition is as small as I can get it for the purpose I have in mind.

    Are there are any work-arounds for the 4.5GB limit on creating ISO files, or is there another way to accomplish the goal of creating a mostly automated recovery DVD for non-technical users?  I was really hoping that Clonezilla would be capable of this, but I've tried different things and I've learned virtually nothing.

    Thanks,
    Nathan

     
  • Steven Shiau

    Steven Shiau - 2011-03-07

    Sorry, no. It's a tough issue for this kind of piping programs to deal with multiple CDs/DVDs when restoring.
    Maybe you can use double layer DVD? Or a USB flash drive?

    Steven.

     
  • N Plant

    N Plant - 2011-03-07

    Steven - I may be grossly misinterpreting the documentation, but I'm actually trying to use a dual-layer burner & media.  My understanding of the documentation is that mkisofs only allows up to 4.5GB ISO files (which would make sense for fitting it to a standard, single-layer DVD).

    I haven't tried the USB drive yet because I have been doing ISO files plus USB or just ISO alone, and every time I do, I get errors.  I'll check out the USB-only option and see what I can come up with.  Do you know that the USB method works for image files greater than 8GB in size?

    Thanks,
    Nathan

     
  • N Plant

    N Plant - 2011-03-08

    Steven - I tried doing just the ZIP for flash drives today, and the file creation errored out at just over 4GB, out of an estimated 10+GB that was projected.  Not sure what the issue was, though - it just reported the failure was unrecoverable.  The resulting file was corrupted.  There was plenty of space available on the target drive (upwards of 90GB).

     
  • Steven Shiau

    Steven Shiau - 2011-03-08

    What's the file system on your flash drive? If it's FAT, there is a limit for single file size ~ 2 GB.
    Try to use NTFS.

    Steven.

     
  • Steven Shiau

    Steven Shiau - 2011-03-08

    BTW, "My understanding of the documentation is that mkisofs only allows up to 4.5GB ISO files " -> In Clonezilla, genisoimage is used to create the iso file.

    Steven.

     

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