Messages in this thread | | | Date | Tue, 16 Jan 2001 15:04:01 -0600 | From | Timur Tabi <> | Subject | Re: Linux not adhering to BIOS Drive boot order? |
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** Reply to message from "Christopher Friesen" <cfriesen@nortelnetworks.com> on Tue, 16 Jan 2001 14:54:23 -0500
> > The Mac never enumerates its devices like the PC does (no C: D: etc, no > > /dev/sda, /dev/sdb, or anything like that). It also remembers the boot device > > in its EEPROM (the Startup Disk Control Panel handles this). > > Are you sure about that? According to my documentation on installing linux on a G4 > with scsi disks, you need to specify a device enumeration string like the following > to tell the system where to look for the boot device: > > /pci@f2000000/pci-bridge@d/ATTO,ExpressPCIProUL2D@4,1/@6:5 > > where the '6' is the SCSI ID of the drive, and the '5' is the partition number of the > boot partition. So if you change SCSI IDs or add a new partition and change the > partition numbering of the drive, your computer can't boot anymore.
I was talking about a Mac running Mac OS. I've tried change the SCSI ID of the boot device, but this discussion was about adding devices. On a Mac, I've always been able to add devices, whether they be on an exiting SCSI or IDE bus, or on a new bus, and not worry about the machine not booting.
I can't same the same about the PC. Overall, the PC is just much more sensitive to device changes than Macs are. And I think it's because the Mac BIOS and OS are just designed to handle this better. The PC BIOS never had any provision for a third-party boot device to annouce itself.
-- Timur Tabi - ttabi@interactivesi.com Interactive Silicon - http://www.interactivesi.com
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