Date: Sun, 29 Jul 2018 23:42:36 -0600 From: Warner Losh <imp@bsdimp.com> To: Eugene Grosbein <eugen@grosbein.net> 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: <CANCZdfoYUq4iSASpQmF34_0f66iWCbD=w6UNqFnQVgA8eWJHtg@mail.gmail.com> In-Reply-To: <5B5EA213.9090006@grosbein.net> References: <201807292102.w6TL2Cq4062739@pdx.rh.CN85.dnsmgr.net> <144DA23D-26CF-4293-AE97-54CC8D6B52E3@gmail.com> <5B5EA213.9090006@grosbein.net>
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On Sun, Jul 29, 2018, 11:31 PM Eugene Grosbein <eugen@grosbein.net> wrote: > 30.07.2018 7:52, David Cross wrote: > > > Just a named GPT UUID type, like freebsd-swap, freebsd-ufs > > > > As for ambiguous data: consider you have a RAID 10 of a UFS filesystem. > > If you put that into freebsd-ufs freebsd-boot will see that and > potentially attempt to boot it. > > 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... Warner _______________________________________________ > freebsd-hackers@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-hackers > To unsubscribe, send any mail to "freebsd-hackers-unsubscribe@freebsd.org" >
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