On Thu, Jan 17, 2002 at 01:27:08AM -0800, Terry Lambert wrote:
> Ruslan Ermilov wrote:
> > FWIW, modern -CURRENT's should be able to downgrade to -STABLE
> > without problems.  If it's broken, please let me know, and I'll
> > fix it.  I mean "if it WILL be broken", as tonight's -CURRENT
> > has successfully built -STABLE.  Didn't test the `installworld'
> > part, but I don't believe there are any problems with it.
> Config file changes are still a problem: they won't be
> reflected back, due to version changes (if any).  There
> were a number of problems with /etc/pam.conf compatability
> and OpenSSH v1 vs. v2 and already generated certs needing
> to be regenerated as a result, last time I went back to 4.x
> from a 5.x.
Um, what do you mean by "config file changes"?  Of course
you can't use stock 5.0-CURRENT config files, it's clear.
As for config(8), it's in bootstrap-tools, and shouldn't
be a problem.  Buildkernel works fine here.

> The MAKEDEV problem is more pronounced moving from -current,
> since -current has devfs.
> My recommendation would be *against* using "makeinstallworld",
> since with a CDROM approach, the devfs isn't mounted on /dev,
> so the devices get made correctly (devfs would also throw a
> wrench into the NFS mounted CDROM approach I talked about
> before; sorry).
I avoid these problems by installing with DESTDIR=/STABLE.  :-)

> As I said before about boot blocks: all bets are off: I have
> no idea whether or not they are capable of booting older
> versions of the code correctly any more; there have been
> some recent problems because of some changes, and because of
> a bzero that Alfred was rumored to have lost from Jon Mini
> and James Harris' contributions toward an updated FORTH-based
> "nextboot"... ;^).
Not sure about this one.

Perhaps the following would be safe:

1)  You copy your /, /var, and /usr holding disks.
2)  You mount copies to /mnt.
3)  You ``installworld'' and ``installkernel'' with DESTDIR=/mnt
4)  You install 4.x bootblocks (from /mnt/boot) to /mnt

Ruslan Ermilov          Oracle Developer/DBA,
[EMAIL PROTECTED]           Sunbay Software AG,
[EMAIL PROTECTED]          FreeBSD committer,
+380.652.512.251        Simferopol, Ukraine

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