OS X and 8 gig. |
August, 31, 2002 1:31 AM |
L.Sargent4 |
Can someone point me to an article about why some old world Macs require OS X to be install in 8 gigs or less? I have received atleast three emails on the topic and I have a nine nine gig dual partition. Lee |
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RE: OS X and 8 gig. |
September, 03, 2002 12:07 AM |
OSXGuru |
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The root issue is that there is a bug in the Open Firmware drivers for the ATA bus on the Beige G3. This bug prevents Open Firmware from reading past the 8 GB mark on a drive. It doesn't affect booting Mac OS 9, because Mac OS 9 does not use Open Firmware to read the drive. But the boot process for Mac OS X does. It is probably the case that this bug only applies to machines with a native ATA bus. That is, it probably does not apply to IDE cards. However, the Mac OS X Installer enforces the 8 GB limit with respect to any IDE bus on an "Old World" machine, whether native or a PCI card. The one further complication is that some IDE cards (the Tempo/66 for instance), pretend to be SCSI cards as far as Mac OS X is concerned, in which case the problem does not apply. |
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RE: OS X and 8 gig. |
September, 02, 2002 6:09 AM |
john.england |
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only on IDE drives I think. |
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