>> On Mac mini G4? Really?

> Words of Apple users and pros, not mine.

Can you quote these words, please?

> Is there anyone in MorphOS land who ever tried installing big size
> IDE hard disks on their Mac Mini G4, and could tell us his experience?

MorphZone is full of Mac mini G4 users who successfully use HDDs >128 GiB with on-board PATA controller. Just three random threads:

https://morph.zone/modules/newbb_plus/viewtopic.php?topic_id=6743&forum=11
https://morph.zone/modules/newbb_plus/viewtopic.php?topic_id=6966&forum=11
https://morph.zone/modules/newbb_plus/viewtopic.php?topic_id=8212&forum=11

> maybe controller device could be tricked by passing it magic data that
> override its limit directly from partition header... who knows?

PATA controller doesn't know anything about partitions.