Professional Web Applications Themes

bad CRC in rar file - FreeBSD

Hello, I have a collection of rar files that all hold together one .iso file. One of the rar files has a bad CRC so rar fails to extract the ISO image. Does anyone know if there is a different application that can extract this image even though there are crc errors? I looked at the rar manpage and it didn't seem like rar could do it. Thanks /Brian...

  1. #1

    Default bad CRC in rar file

    Hello, I have a collection of rar files that all hold together one .iso
    file. One of the rar files has a bad CRC so rar fails to extract the ISO
    image. Does anyone know if there is a different application that can
    extract this image even though there are crc errors? I looked at the rar
    manpage and it didn't seem like rar could do it.

    Thanks

    /Brian
    Brian Guest

  2. #2

    Default Re: bad CRC in rar file

    On Mon, Mar 14, 2005 at 02:24:57PM -0600, Brian John wrote: 

    The unrar utility in ports says the "kb" command line switch will "keep
    broken". Remember mounting a bad ISO image may crash your computer.

    Generally one uses par files to validate and repair rar files before
    reassembling the original image. To generate par files for this purpose
    one has to start with a good set of rar files.

    --
    David Kelly N4HHE, net
    ================================================== ======================
    Whom computers would destroy, they must first drive mad.
    David Guest

  3. #3

    Default Re: Re: bad CRC in rar file

    > On Mon, Mar 14, 2005 at 02:24:57PM -0600, Brian John wrote: 
    >
    > The unrar utility in ports says the "kb" command line switch will "keep
    > broken". Remember mounting a bad ISO image may crash your computer.
    >
    > Generally one uses par files to validate and repair rar files before
    > reassembling the original image. To generate par files for this purpose
    > one has to start with a good set of rar files.
    >[/ref]
    par files? I've never heard of those. What is the purpose of par files
    if you already have a good set of rar files? Is the idea that the same
    person that distributes the original rar files will also distribute par
    files with them? Is there anything that can 'patch' a bad ISO fail so
    that it is at least mountable?

    Thanks for the help

    /Brian
     
    "org" 
    Brian Guest

  4. #4

    Default Re: Re: bad CRC in rar file

    On Mon, Mar 14, 2005 at 03:13:10PM -0600, Brian John wrote: 
    > par files? I've never heard of those. What is the purpose of par
    > files if you already have a good set of rar files? Is the idea that
    > the same person that distributes the original rar files will also
    > distribute par files with them?[/ref]

    Yes. "Par" as in parity. The par files would contain redundant
    information which is intended to be used to verify/repair broken file(s)
    (not necessarily rar files). Essentially the same as Forward Error
    Correction.

    If you have incomplete or damaged files then you need par files to
    repair. Can not create par files out of bad files.

    --
    David Kelly N4HHE, net
    ================================================== ======================
    Whom computers would destroy, they must first drive mad.
    David Guest

Similar Threads

  1. problem in binding xml file data to datagrid xml file isgenerated through JSP file
    By ckshah in forum Macromedia Flex General Discussion
    Replies: 2
    Last Post: May 26th, 03:55 PM
  2. File Viewer / Bloated file sizes / What is the best file format?
    By Martin_Folley@adobeforums.com in forum Adobe Illustrator Windows
    Replies: 1
    Last Post: June 27th, 05:24 PM
  3. Open file, make changes, save file, close, re-open, file contents not changed
    By brock@bergdesign.com in forum Adobe Illustrator Macintosh
    Replies: 7
    Last Post: March 7th, 07:29 PM
  4. Replies: 7
    Last Post: November 27th, 04:52 PM
  5. Replies: 8
    Last Post: July 26th, 04:02 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139