Trouble Booting into OS X |
May, 02, 2003 8:49 PM |
johnorjudy |
My system is 7600 w/ Sonnet 700MHz G4, 576MB RAM, 36GB IBM Ultrstar HD w/ 4 partitions [Mac OS X, Mac Classic (9.1) , Spare, and Mac OS 9.1], original CD-ROM,4MB logic board video, and an external SCSI Zip100 drive. I've been having a lot of trouble with each step of the process of upgrading to G4 and getting OS X installed. I finally got the G4 installed and seemingly running properly but now I'm stuck in the middle of OS X installation. I had been trying the Sonnet PCI X Install 1.2.6 software just to try something different. However, at the point of the installation process when it's supposed to boot from the OS X Install CD, I kept getting this crazy broken folder icon that signified a dead end to the process. When I called Sonnet tech support, he told me to switch my internal SCSI cable to the external SCSI bus (bus 1) by means of a logic board connector immediately adjacent to the internal bus connector. I couldn't believe it! But sure enough when I looked, there was an external bus connector right where he said. After making the change of connection, the boot from the OS X Install CD went smoothly and I was able to finish the installation. I had asked the Sonnet guy if I was ever going to be able to return to the internal SCSI bus (bus 0), but he said he didn't know. So when I was all done with the OS X (10.2) installation, I tried to return the connector to the internal bus. Unfortunately the machine will not boot into OS X (using XPF) with this configuration. All I get is a blank screen that eventually reboots to OS 9.1 after about 10 minutes. (I'm using XPF to try to boot to OS X because the Sonnet instructions are so pitifully inadequate, they don't even cover how to boot into X!! It seems like they somehow think I'll know how to do this without their telling me.) Anyhow when I return the connector back to bus 1, the machine will then boot into OS X. What's with this??!! Am I forever condemned to run at the slower external SCSI bus speed? I did try throttling in XPF all the way up to 24 to no avail; it still won't boot on SCSI bus 0. Anyone got any ideas how to get things to work on the faster bus? |
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RE: Trouble Booting into OS X |
May, 07, 2003 10:10 AM |
johnorjudy |
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Lonnie, what machine and which HDD were you having trouble with? I'm guessing that if it weren't a 7x00, trouble getting to the SCSI connector would really bias your choices. I know it would mine. The 7600 is ultra easy to get into. Good luck! John Hixson |
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RE: Trouble Booting into OS X |
May, 06, 2003 11:53 PM |
ltking |
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Hi All: Wow! John, this is precisely the spot I got stuck at and simply gave up intending to keep the boot drive on the "exterbal bus." I may go back to experimenting with this again. I have been spending so much effort on simply getting two reliable systems going that I'd given up on any fine tuning until now. Thanks to all and welcome back Ryan. Lonnie |
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RE: Trouble Booting into OS X |
May, 04, 2003 9:19 PM |
johnorjudy |
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Thanks, Ryan! The "Disable Unit Attention" jumper did the trick. Immediately upon setting the jumper the boot still wouldn't work, so I put the throttle setting at 24 and tried again. This time it booted! I then backed off the throttle setting--testing at each setting--until I got back to a setting of 8. It's now booting just fine. Again thanks for your incredible depth of knowledge. John Hixson |
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RE: Trouble Booting into OS X |
May, 03, 2003 12:03 PM |
OSXGuru |
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On the Ultrastars, it sometimes helps to adjust the jumper settings on the drive itself. I believe it is the "Disable Unit Attention" setting that sometimes makes the difference. |
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