I will explain. Imagine three usecases - IDE, SII 3x1x and Promise.
I assume read speeds with overclocked Pegasos2 - 1.33Ghz
1. onboard IDE/PATA controller with SATA reduction ( 55 MB/s ):
nothing special, all partitions are visible from OpenFirmware(OF), all volumes can be on IDE HDD/SSD.
2. PCI card SII 3x1x - SATA I ( 84 MB/s ):
you can easily boot ( I wrote it in my post somewhere above ) this way:
- kernel and core drivers, incl. 3x1x driver have to be on IDE CF/HDD/SSD. It means boot.img (for MorphOs) and amigaboot.of+Kikckstart (for AmigaOs) must reside on IDE partition, everything other, include volume System: can be on SII 3x1x HDD/SSD.
3. PCI card Promise - SATA II ( 114 MB/s ):
- to boot easy way (like SII 3x1x), kernel and core drivers, incl. Promise driver have to be on IDE CF/HDD/SSD.
Unfortunatelly AmigaOs have no Promise driver, so this card is unusable for any AmigaOs volumes.
MorphOs dont't have Promise driver builtin in boot.img. The Promise MorphOs driver (ulsata2.device) reside on DEVS: and all volumes on Promise card have to be mounted via mount command+mountlist.
It means, that your System: volume must be active and readable BEFORE mounting Promise Volumes.
There are several partial solutions:
- Use Promise only for Work:, Backup: etc. Volume System: and all AmigaOs volumes stay on slow IDE.
- System: on SII 3x1x. This occupy two of three PCI slots for SATA adapters.
- Two System: volumes. One on IDE partition to boot from it. Second is identical copy on Promise volume. After boot process you have to mount Promise volumes, dismount all assigns on IDE and assign all to Promise. I don't test it, if is it possible.
In any case, I use Pegasos for both MorphOs and AmigaOs, so Promise have sense for me only if I have free PCI slot. I have occupied all three ( SII 3x14 card, USB2 card, SoundBlasterLive! )
Here is explanation of booting process
MorphOS: https://library.morph.zone/Open_Firmwar ... ng_MorphOS
AmigaOs: https://wiki.amigaos.net/wiki/UserDoc:H ... _procedure http://lifeofliveforit.blogspot.com/201 ... gaos4.html