Re: Mixing partitioned and non-partitioned discs in a RAID?

[Kai Krakow <hurikhan77@gmail.com>]

Am Tue, 13 Sep 2016 04:07:37 +0000 (UTC)
schrieb Duncan <1i5t5.duncan@cox.net>:

> Kai Krakow posted on Tue, 13 Sep 2016 00:21:10 +0200 as excerpted:
> 
> > Am Sun, 21 Aug 2016 02:19:33 +0000 (UTC)
> > schrieb Duncan <1i5t5.duncan@cox.net>:
> >   
> >> Chris Murphy posted on Sat, 20 Aug 2016 18:36:21 -0600 as
> >> excerpted: 
>  [...]  
> >> 
> >> Depends on the distro.  On gentoo, you set it up the way you want
> >> of course, but the recommendation has always been /boot, and now
> >> the ESP, not mounted by default.
> >> 
> >> But that would be /expected/ on gentoo, since being able to
> >> configure it the way you want is the whole /point/ of running
> >> gentoo in the first place.  Sort of like arch, only much more so.  
> > 
> > systemd systems (I'm booting Gentoo with systemd) should auto-mount
> > ESP to /boot on access, and auto-unmount after a short timeout. So
> > the solution to this problem is already wired into systemd if you
> > use (a) proper GPT setup (with correct GUIDs) and (b) do not
> > mention /boot in fstab.  
> 
> No "automagic" on-access mounting here.  The kernel options aren't
> turned on for it, neither do I want them on (the systemd ebuild
> checks for and recommends but does not force them, and systemd
> functions fine without them except it doesn't automount on access,
> which is pretty much the point).  What gets mounted on boot is what I
> have in fstab (plus a few things like cgroups that systemd handles
> entirely on its own).  After that, nothing else is mounted unless I
> mount it, or unmounted, unless I umount it or systemd does it as part
> of shutdown, etc.

https://www.freedesktop.org/software/systemd/man/systemd-gpt-auto-generator.html

FD> Mount and automount units for the EFI System Partition (ESP),
FD> mounting it to /boot, are generated on EFI systems where the boot
FD> loader communicates the used ESP to the operating system. Since
FD> this generator creates an automount unit, the mount will only be
FD> activated on-demand, when accessed. On systems where /boot is an
FD> explicitly configured mount (for example, listed in fstab(5)) or
FD> where the /boot mount point is non-empty, no mount units are
FD> generated.

So there are a few points when this does not happen. It does not
blindly auto-mount ESP.

> However, good point about systemd, since it should more or less
> standardize handling across mainline distros over the longer term,
> except of course where admins/distros specifically configure it
> otherwise, as I've done here.
 
I also explicitly put it in fstab - so the generator doesn't work for
me.


-- 
Regards,
Kai

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