On Wed, Oct 11, 2017 at 11:01 AM, Stuart Henderson <s...@spacehopper.org> wrote: > What is not good is when you do have a RAID array, the controller is > in RAID mode, but OpenBSD doesn't understand the metadata, so it corrupts > data on the disk. > > This is a difficult area. We don't want to corrupt data, but then some > BIOS don't allow this option to be changed at all, and on others BIOS > only offer a choice between IDE and (unsupported) RAID, even though > it's an AHCI controller.
Would a config flag for ahci(4) that when enabled, forces it to attach to the Intel RAID PCI IDs, work here, or would that have to be handled at a lower level? If so, users who have a broken BIOS or are willing to accept the risk of destroying their RAID metadata could enable the flag with UKC, but the defaults would remain safe.
