Re: update-grub: how to avoid scanning all devices

[Pascal Hambourg <pascal@plouf.fr.eu.org>]

Le 15/12/2017 à 17:40, Brian a écrit :
> On Fri 15 Dec 2017 at 16:31:54 +0100, Pascal Hambourg wrote:
>
> > Le 15/12/2017 à 14:42, Richard Owlett a écrit :
> > > I have 2 similar problems which wouldn't be solved by disabling os-prober.
> > >
> > > The common characteristic is wishing to probe all operating systems
> > > residing on on a specific physical device. I multi-boot. There may be an
> > > OS on any number of mounted devices (flash drives etc) which I do not
> > > wish to probe.
> >
> > I do not know any way to tell os-prober to limit the set of probed devices.
> > I guess you could edit /etc/grub.d/30_os-prober to filter out unwanted
> > devices from os-prober output with grep or so.
>
> GRUB_OS_PROBER_SKIP_LIST? It's mentioned in /etc/grub.d/30_os-prober
> and /usr/sbin/grub-mkconfig.

Yes, it is described in 
<https://www.gnu.org/software/grub/manual/grub/grub.html>.

‘GRUB_OS_PROBER_SKIP_LIST’

    List of space-separated FS UUIDs of filesystems to be ignored from 
os-prober output. For efi chainloaders it’s <UUID>@<EFI FILE>

But it allows to exclude only known filesystems.