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Thread: Invalid PPC ISOs or invalid instructions?

  1. #1
    Join Date
    Sep 2006
    Beans
    10

    Question Invalid PPC ISOs or invalid instructions?

    I am trying to recover my Ubuntu (from broken 10.04 installation) on Power G4. The Superdrive is not functioning - so I am trying to give USB boot a try. The are instructions here:

    https://help.ubuntu.com/community/In...n/FromUSBStick

    I am following them... Up to the point where hdiutil has to convert .iso to .dmg:

    Convert the .iso file to .img using the convert option of hdiutil (e.g., hdiutil convert -format UDRW -o ~/path/to/target.img ~/path/to/kubuntu.iso) Note: OS X tends to put the .dmg ending on the output file automatically.

    No luck. I am getting the error. Same thing actually happens with the release ISO 9.10. Tried on 2 Macs:

    $ hdiutil convert -format UDRW -o out.img lucid-alternate-powerpc.iso
    Reading Driver Descriptor Map (DDM : 0)…
    Reading Apple (Apple_partition_map : 1)…
    Reading Ubuntu 10.04 ppc (Apple_ISO : 2)…
    Reading Ubuntu 10.04 ppc (Apple_HFS : 3)…
    .................................................. ............................
    Usage: hdiutil convert -format <format> -o <outfile> [options] <image>
    hdiutil convert -help


    With -versbose, I getting the error code 22

    DIDiskImageConvertWithDiskImage: converter returned 22

    hdiutil: convert: result: 22


    Any ideas? How could I make bootable flash?

  2. #2
    Join Date
    Mar 2011
    Beans
    5

    Re: Invalid PPC ISOs or invalid instructions?

    Quote Originally Posted by svu View Post
    I am trying to recover my Ubuntu (from broken 10.04 installation) on Power G4. The Superdrive is not functioning - so I am trying to give USB boot a try. The are instructions here:

    https://help.ubuntu.com/community/In...n/FromUSBStick

    I am following them... Up to the point where hdiutil has to convert .iso to .dmg:

    Convert the .iso file to .img using the convert option of hdiutil (e.g., hdiutil convert -format UDRW -o ~/path/to/target.img ~/path/to/kubuntu.iso) Note: OS X tends to put the .dmg ending on the output file automatically.

    No luck. I am getting the error. Same thing actually happens with the release ISO 9.10. Tried on 2 Macs:

    $ hdiutil convert -format UDRW -o out.img lucid-alternate-powerpc.iso
    Reading Driver Descriptor Map (DDM : 0)…
    Reading Apple (Apple_partition_map : 1)…
    Reading Ubuntu 10.04 ppc (Apple_ISO : 2)…
    Reading Ubuntu 10.04 ppc (Apple_HFS : 3)…
    .................................................. ............................
    Usage: hdiutil convert -format <format> -o <outfile> [options] <image>
    hdiutil convert -help


    With -versbose, I getting the error code 22

    DIDiskImageConvertWithDiskImage: converter returned 22

    hdiutil: convert: result: 22


    Any ideas? How could I make bootable flash?
    resurrection!

    I'm encountering the same issue. trying to make a bootable USB key and getting the same usage error as above. oddly enough, I successfully converted two 10.10 .iso's to .img's, but two separate 10.04 .iso's have stopped me here.

    did you manage to figure it out? thanks for any info.

  3. #3
    Join Date
    Mar 2011
    Beans
    5

    Re: Invalid PPC ISOs or invalid instructions?

    I guess my inclination now is that it's a sign of a faulty .iso. I just downloaded a new one and the conversion worked fine. it's strange though because the .iso that gave me the usage error burned to a CD and booted just fine.

  4. #4

    Re: Invalid PPC ISOs or invalid instructions?

    Quote Originally Posted by lookup View Post
    I guess my inclination now is that it's a sign of a faulty .iso. I just downloaded a new one and the conversion worked fine. it's strange though because the .iso that gave me the usage error burned to a CD and booted just fine.
    You can check the ISO file against the MD5 or SHA-1 hash provided by the same server that you got it from. When they match, there's an extremely high probability than the file is correct.

    Here's one example mirror site:

    http://mirror.anl.gov/pub/ubuntu-iso...10.10/release/

    Those are the wrong architecture and the DVD ISOs, but it's just an example. See the MD5SUMS , SHA1SUMS, and so forth? Those textfiles have the hashes in them.

    The typical console programs used to calculate these hashes are called 'md5sum' and 'sha1sum', respectively. (There are many programs which can do the job, however. You needn't limit yourself to these.)

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