On Thu, Oct 12, 2017 at 02:56:19AM +0300, Rostislav Krasny wrote: > On Thu, Oct 12, 2017 at 2:43 AM, Mike Larkin <mlar...@azathoth.net> wrote: > > 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@. > > As I already told 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 just > googled for the technical information. >
Then it sounds like you have a fantastic learning opportunity here! -ml
