On Thu, Aug 21, 2025 at 10:13:29PM -0400, Hendrik Boom wrote:
> On Thu, Aug 21, 2025 at 08:59:53PM -0500, golinux wrote:
> > On 2025-08-21 20:40, Hendrik Boom wrote:
> > > Does usrmerge have to happen before uprgade from desalus to excalibur?
> > >
> > > Or is that for the next bug upgrade after excalibur?
> > >
> > > I currently have separate partitions for / and for /usr.
> > >
> > > Will /usr still be a separate partition from / ?
> > >
> > > Should I repartition so that /usr has at least as much free space
> > > as / currently has occupied space? Presumably it will have to be able
> > > to get a copy of everything from /bin, /sbin, and /lib.
> > >
> > > Or should I preemtively move everything in now in the /usr
> > > partition into a new /usr file tree within / , thereby
> > > abolishing the separate /usr partition?
> > >
> > > -- hendrik
> > >
> >
> > Hi Hendrik,
> >
> > This should answer at least some of your questions:
> >
> > https://www.devuan.org/os/announce/excalibur-usrmerge-announce-2024-02-20.html
>
> It does.
> But it is unclear on one thing: It says
> * ensure there is sufficient disk space to accommodate the merge
> but it doesn't say how to estimate the disk space that will be needed.
>
> I managed to figure out that usr merge involves moving stuff from
> other places into /usr, so it's /usr that has to have enough free space.
>
> But I've seen enough confusion online over the past few months that
> it should be very explcit about estimating how much space will be
> needed where.

A usrmerge includes moving all files in /bin, /sbin and /lib* to be
under /usr. Therefore /usr must have space enough to accomodate that.
At the end of usrmerge you will have symbolic links from /bin to
/usr/bin, /sbin to /usr/sbin, etc., and the files in /bin have beein
moved to be in /usr/bin, etc.

You also need the /usr mount to be declared in /etc/fstab within the
initrd in order to have /usr duly mounted before pivot (or switch_root
as it's called today).

Ralph.

>
> -- hendrik
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