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  1. #1

    What does alloc magic broken mean?


    I am running linux mint9 32bit on a desktop that I built with some luck. Anyway, in
    the last couple of weeks it has been restarting itself randomly and at times I have to restart it several times. It also will just shut off for no apparent reason.

    Which brings me to my question. It now appears that it will not boot again and I
    get the message "alloc magic is broken at 0x7fe03a00 aborted. Press any key to exit" when a key is pressed it states it cannot find grub and to tell it where to boot
    or insert bootable medium.

    So what does "alloc magic is broken" mean? I can't find it anywhere.

    I fear my hard drive is dead or there is a problem with the motherboard.

    Sorry I can't give more detail but it quit again.

    Thanks in advance for any help.
    Mike

  2. #2
    "alloc magic is broken" is an error that occurs in the GRUB memory management.

    The GRUB memory manager uses magic numbers in each of it's memory block structures to denote whether that chunk is available or free. When a function in the GRUB loader attempts to free memory, it checks to see if that block is allocated by checking for the magic allocated number. If it doesn't match, you see this error.

    When during the boot does it fail? Are you able to see the GRUB menu which lists the operating systems to boot? Are you able to access the GRUB rescue shell to perform diagnostics and try to manually boot your kernel? Are you able to boot a live CD and mount the drive there to ensure that it's not a hard drive issue? Have you updated GRUB recently before seeing this error?

  3. #3
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    Lightbulb [SOLVED] a very similar problem, for benefit of 'searchers'

    Quote Originally Posted by fxaddict View Post
    ... in the last couple of weeks it has been restarting itself randomly and at times I have to restart it several times. It also will just shut off for no apparent reason. ...Mike
    Since the OP never got back with the resolution and I came across this in a search for the same problem, perhaps this adddition will make the thread more helpful to others.

    In my case, cleaning the RAM contacts and sockets cured it. My problem was also intermittent, suggestive of a poor electrical contact.

    Computer now runs and boots like new.

    The contacts were visibly tarnished (in one area, on one chip) and just liquid electronic contact cleaner wasn't working. Silver polish was needed to cut through the film. After that, liquid contact cleaner applied until the black oxide residue stops coming onto cloth, then reinsert into sockets.

    Problem solved at next boot, with same memory chips, but cleaned.

    I thought these contacts were supposed to be gold plated and if so, the black (oxide?) residue was totally unexpected. Whatever this film/tarnish was, I'm sure it was non-conductive ... these are Kingston chips, a reputable brand.

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