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Thread: loop mount error

  1. #1
    Junior Member
    Join Date
    Mar 2003
    Location
    India
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    4

    loop mount error

    I was unable to mount the iso image via loop device
    example
    dd if=/dev/zero of=/ramdisk/test.iso bs=1024k count-20
    mke2fs -b 2048 /ramdisk/test.iso
    (press y for continue)
    mkdir /test
    mount -o loop /tmp/test.iso /test

    (it gives error as ioctl: LOOP_SET_FD invalid argument)

    so please advice me is there any other way to mount the iso file

  2. #2
    Senior Member registered user
    Join Date
    Nov 2002
    Location
    Auckland, New Zealand
    Posts
    818
    you cannot mount loopback fs's from a ramdisk. copy it to a real partition then try to mount it.

  3. #3
    Junior Member registered user
    Join Date
    May 2003
    Posts
    21
    Quote Originally Posted by eadz
    you cannot mount loopback fs's from a ramdisk. copy it to a real partition then try to mount it.
    So how is it possible that the kernel on the knoppix CD can do it from tmpfs (/ramdisk).

    It does a loopback mount when it creates the image for the terminal-server on line 230 in /etc/init.d/knoppix-terminalserver

    When I use my own kernel it doesn't work, so anyone an idea what other patches knoppix uses to make this work?

  4. #4
    Junior Member
    Join Date
    Mar 2003
    Location
    India
    Posts
    4

    Mounting ISO Image

    I sorted out this problem, when you copy the iso image to /ramdisk it doesn't work and it will work if you copy the iso image to /, but yiu need to rebuild the initrd.gz with more space

  5. #5
    Junior Member registered user
    Join Date
    May 2003
    Posts
    21
    FYI

    I've found the solution .. knoppix uses loop-aes which seems to work on tmpfs

    http://www.knopper.net/knoppix/sourc..._1.6i-1.tar.gz

    I've used that module and now I can loopback mount images

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