I have a PowerMac 9600 with a Newer Tech G3 upgrade (the logic board is questionable, but it's stable for now).
I recently installed a SeriTek/1S2 clone PCI SATA card and have connected an older non-SSD 500GB Seagate SATA drive. OS 9.1 has no problem reading and writing to the drive and I was able to install a clean copy of OS 9.1. However I'm having trouble booting from it.
The Happy Mac does show up, but it seems to show up a little later than unusual and then briefly get a darker gray screen before the system reboots. It almost looks like it's going to show a Sad Mac, but doesn't. Once it reboots, it shows the floppy disk question icon, but then boots from the internal SCSI drive. Browsing the SATA drive, the System Folder seems to lose it's blessing (no longer shows the correct Icon). I'm not sure if that's related, but fixing that has no effect.
I've tried searching on this issue, but couldn't find much. My only thought could be an incompatible SATA drive, but I wanted to see if there was something I'm missing. Thank you!