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| Select boot volume on startup |
Posted by: pcamen on 2020-05-07 15:30:49
Seems like this would be easy to find, but I am stumped. How can I select the startup volume (multiple partitions on a single SCSI ID) at startup on an SE/30? I've got a damaged system folder on the first partition and a new 7.1 install on the second.
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Posted by: Dog Cow on 2020-05-07 15:42:24
I have not verified this information:
An old Usenet post from 1991 said that PRAM only stores the SCSI ID #. Partitions are scanned in alphabetical order, so rename the partition that you want to boot from, to come first.
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Posted by: LaPorta on 2020-05-07 16:03:13
I don’t know that that is possible. I’d recommend just start from a floppy, fix the broken system, or just I’m use the floppy’s Startup Disk control panel to select the correct partition. There were key commends to select a particular SCSI drive, but partition? Not sure
I just double-checked my MacSecrets books. Command-Option-Shift-Delete should make it ignore the HD entirely, and add a number to that to start from a specific SCSI ID. If you have an external SCSI drive you’d want to use, add it’s SCSI ID to that command to start from it.
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Posted by: KnobsNSwitches on 2020-05-07 16:15:02
System Picker https://macintoshgarden.org/apps/system-picker should be just what you need!
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Posted by: LaPorta on 2020-05-07 16:25:56
That works wonderfully normally, but if he is stuck in a startup loop, he can’t use that.
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