Some individuals still install OS 9 and OS X on the very same single partition. I often fail to remember this. But this is not the situation here, correct?
You have two partitions on the OWC Electra 3G 500 GB and you’ve installed OS 9 on the first partition? And THAT partition is 190 GB or less? Leaving the remainder for other partition(s)?
If not… then you might try re-partitioning and then re-installing OS 9 on that (now) 190 GB or less partition. [I normally will make such a partition targeted for a bootable OS 9, 120 GB or so. Again, this is something that you might try.]
AND some have reported other such SATA controllers (like the Sonnet) having difficulties with Quicksilvers. So maybe try the above re-partitioning of the 500 GB OWC and only install OS 9 on the first partition to test this scenario. If it works with a smaller size partition for OS 9 — then perhaps you can load up (install) Tiger, etc. on the other partition(s) afterwards.
