Thought I would update to AHCI from IDE drivers/controller as well reading this thread but I have been unsuccessful.
I added BASEDEV=OS2AHCI.ADD to my Arca config.sys but the container stops booting, just displays the Arca boot screen, no error message, and does not progress any further even I leave it 30 minutes.
I'm using Virtualbox Version 6.1.40 r154048 (Qt5.12.

[Stable channel] under Ubuntu.
Version 7.x of Virtualbox is not listed as Stable, I did try upgrading to it a while ago and very quicky reverted back to 6.1.40.x due to wierd stuff, so will stick to the stable channel from now on.