On 2017-10-11, Rostislav Krasny <rosti....@gmail.com> wrote: > On Wed, Oct 11, 2017 at 6:28 AM, Eric Furman <ericfur...@fastmail.net> wrote: >> On Tue, Oct 10, 2017, at 04:29 PM, Rostislav Krasny wrote: >>> I think it's worth to be supported. The RAID mode of storage >>> controller seems to be a default BIOS configuration in all modern >>> desktop computers. I think most desktop users don't configure any real >>> RAID and continue to use their disks as separate devices. If at least >>> this RAID configuration is supported it would be a great progress. >> >> I disagree, but that's just my opinion. >> And just because something is "a default BIOS configuration in all >> modern desktop computers" doesn't mean it's a good thing. > > Most desktop users don't change BIOS settings. They just try a > software and if it doesn't work they usually throw it away and > consider that software as bad or broken. In case of dual-boot they > also depend on the previously installed OS. In case of already > installed Windows changing the storage controller mode in BIOS from > RAID to AHCI leads to BSoD. After all not supporting a common BIOS > configuration leads to loss of users. > > What is not good in RAID mode without actual RAID array, except the > fact OpenBSD doesn't run on it?
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. I don't think we (developers) are particularly bothered about users who can't be bothered to change an existing BIOS setting.
