On Thu, Oct 12, 2017 at 02:36:11AM +0300, Rostislav Krasny wrote: > On Thu, Oct 12, 2017 at 1:10 AM, Stefan Sperling <s...@stsp.name> wrote: > > On Thu, Oct 12, 2017 at 12:18:52AM +0300, Rostislav Krasny wrote: > >> You just lose users and popularity. > > > > In this community, your statement has the opposite effect of what it is > > trying to achieve. It puts developers off and discourages them from > > worrying about your problem. > > > > At any given moment, there are enough problems developers have to worry > > about already. Hardware they want to use which does not work yet, new > > problems people report in code they've recently changed, chasing new > > developments in code they've ported from other projects, new features > > they want to implement, etc. etc.; all stacked against limited time. > > Worrying about popularity on top of it all would just be distracting. > > > > The mindset here is that if you really want something fixed in OpenBSD, > > try to fix it yourself, and then try to share your fix with the rest of us. > > That's how, collectively, we produce value, and popularity has nothing to > > do with it. > > I'm not familiar with the OpenBSD code and I even don't have a working > OpenBSD system to try fixing it by myself. > > I think you can easily identify hard disks that are not part of any > software RAID array and support only them when the RAID mode is > enabled in BIOS. You can do it by looking for the 0xa92b4efc "Magic > Number" of the RAID superblock at the end of the disk and at 4K from > the beginning of the disk. If it's NOT present then this disk is not > part of any RAID array and you may use it directly as in AHCI mode. It > seems you don't have to understand the whole RAID metadata but only be > able to identify its presence. > > I found it there: > https://raid.wiki.kernel.org/index.php/RAID_superblock_formats > https://github.com/neilbrown/mdadm/blob/master/md_p.h > > Also Intel officially recomends the mdadm tool and participated in its > development, so the above information should be good: > https://www.intel.com/content/dam/www/public/us/en/documents/white-papers/rst-linux-paper.pdf > === > The recommended software RAID implementation in Linux* is the open > source MD RAID package. Intel has enhanced MD RAID to support RST > metadata and OROM and it is validated and supported by Intel for > server platforms. > === >
Sounds like you've already done most of the research. Your diff to implement this will be most welcome on tech@. -ml
