> 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.
An option which noone will use because they aren't aware they need to use it? That isn't helpful. 1. It would be better if the metadata are identified, and at minimum the proto disklabel is down-adjusted to protect them. 2. When that safely does the read operations, next step is to parse them in more detail as feed-stock for softraid. 3. Then the final detail is to have softraid initialization capable of creating such metadata. Unfortunately we are still stuck here: 0. No code being developered, email and wiki discussion, gnashing of teeth
