System Drive will not boot from startup

Discussion in 'Mac Pro' started by gaudio, Mar 15, 2010.

  1. gaudio macrumors newbie

    Mar 15, 2010
    Hi all,

    I have a Mac Pro, Intel quad core, with several HDs, 2 of which are bootable. One runs Mac OSX 10.4.9 (and houses Pro Tools HD 7.4) and the other runs 10.5.8 (with Pro Tools HD 8.0.2).

    The Tiger disk is absolutely fine but the Leopard disk will not boot from a stand-still. It can be booted from Startup Disk in System Preferences but if it was the last drive in use then trying boot from off results in a permanent hang on the grey screen.

    A workaround is holding ALT on startup and choose the Tiger disk but this shouldn't be happening so has anyone experienced this and solved it? I'm trying to avoid a full re-instal but that is an option.

  2. Loa macrumors 68000


    May 5, 2003

    Have you tried simply moving the Tiger hard drive from one of the bays to another?

    It sounds strange, but I seem to recall that all the bays are not created equal.

    Maybe it's all rubbish and someone will correct me, but it's something that's easy and quick to test.

    Good luck.


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