Date: Mon, 30 Jul 2018 14:11:14 +0700 From: Eugene Grosbein <eugen@grosbein.net> To: Warner Losh <imp@bsdimp.com> Cc: David Cross <dcrosstech@gmail.com>, "Rodney W. Grimes" <freebsd-rwg@pdx.rh.cn85.dnsmgr.net>, FreeBSD Hackers <freebsd-hackers@freebsd.org> Subject: Re: Request for comments, new geom part type alias: freebsd-geom Message-ID: <5B5EBA12.3020609@grosbein.net> In-Reply-To: <CANCZdfoYUq4iSASpQmF34_0f66iWCbD=w6UNqFnQVgA8eWJHtg@mail.gmail.com> References: <201807292102.w6TL2Cq4062739@pdx.rh.CN85.dnsmgr.net> <144DA23D-26CF-4293-AE97-54CC8D6B52E3@gmail.com> <5B5EA213.9090006@grosbein.net> <CANCZdfoYUq4iSASpQmF34_0f66iWCbD=w6UNqFnQVgA8eWJHtg@mail.gmail.com>
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30.07.2018 12:42, Warner Losh: >> One should just be allowed to mark such a partition "unbootable" so no >> loader even tries to boot it. >> And use any kind of label you like including freebsd-ufs. > > How does one do that? > > We should not "workaround" deficiencies of our loaders (if any) but fix it >> instead of invention of new partition types just for that strange reason. >> > > Normally this is a non issue. > >> If you have a raw raid gstripe, what shows up to the BIOS as to what this >> drives is depends >>> entirely on the _contents_ of the drive at a specific position, >> information that could be controlled by a user. >> >> Why is it important how BIOS shows gstripe'd partitions if they are marked >> not bootable? >> >> There were times when BIOSes unconditionally booted from floppy disk drive >> if it had readable floppy disk >> at boot time, so boot area of such floppy disks had special code saying >> "Non-system disk, replace and strike a key" >> if a floppy was not supposed to be bootable. Boot area of our non-bootable >> partitions might have something similar. >> > > No. They don't. There is no standard way to mark something unbootable... For UEFI case there is the BootOrder list useful for this particular task.
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