SCSI2SD Boot mystery

[jdlanza]

Hi all,

I'm hoping to get your thoughts on the following.  I'm refurbishing a PowerMac 6100/66 (DOS Compatible).  Yanked the hard drive and replaced it with a SCSI2SD v5.1.  Initially formatted the SCSI2SD as 4 4GB devices @ SCSI ID 0,2,4,6 and loaded 8.0 from an official install disc.  Dropped it in.  PowerMac got past the Happy Mac and then immediately throws a "bus error."

1.  Replaced the ribbon cable.  Same behavior.

2. Reconfigured the boot drive on the SCSI2SD to be 1GB only.  Same behavior.

3. Reconfigured the boot drive on the SCSI2SD to be 16GB (only 1 device).  Same behavior. 

The machine will boot from a SCSI2SD v5.5 (the dongle) quite happily and will boot from the CD-ROM, with or without the v5.1 SCSI2SD installed.  The machine also boots quite happily, with the v5.1 SCSI2SD board installed in the SCSI chain, as long as some other volume is identified as the boot volume.  In that case, I have mounted disk volumes all over the place!

I'm left scratching my head at this point.  Any thoughts appreciated.

johnl 

 

[Crutch]

It sounds like your SCSI chain is fine and there's just something wrong with the way 8.0 is getting installed on your SCSI2SD.

Just for kicks .... what happens if you try booting with extensions off?

What happens if you install a different system version on the SCSI2SD 5.1 and try booting from it?

 

[cheesestraws]

PowerMac got past the Happy Mac and then immediately throws a "bus error."

Yup, if it's getting as far as the Happy Mac and then a bus error, odds are pretty good it's the OS that's causing trouble, not the SCSI2SD.  Try just copying a known-bootable System Folder to it in just using the Finder, maybe from the CD?

 

[jdlanza]

Oh, good suggestions!  I had "zeroed" the SD card and clean installed 8.0 on the card, but I haven't tried booting with extensions off or trying 7.6.  Will do that this evening and report!

 

[jdlanza]

@Crutch:

Booting with extensions off gave a clean boot from the SCSI2SD card!  Thanks for the suggestion -- now off to get Conflict Catcher.......

johnl

 

[jdlanza]

For the curious: it looks like it was either Apple Location Manager or Apple Talk Remote Access that was the culprit.

johnl

 

[AlpineRaven]

Has the logicboard been recapped?
Cheers

AP