How to predict drive number change for 7.3->8.1 upgrade?
sperber at deinprogramm.de
Fri Sep 17 12:57:41 UTC 2010
Oliver Fromme <olli at lurza.secnetix.de> writes:
> Michael Sperber <sperber at deinprogramm.de> wrote:
> > I just upgraded my desktop system from 7.3 to 8.1, and the main hard
> > drive, which was /dev/ad6 before is now /dev/ad10. Consequently, the
> > initial boot failed when trying to mount the root file system from ad6.
> > The desktop system is now fixed, but I also have a rented server with
> > only a serial console, and I worry that the upgrade is going to leave me
> > with a dead machine. Is there any way to predict how the drive number
> > changes? (Why does it change at all?) If so, what's the proper way to
> > tell the system the initial root device *before* rebooting?
> Remove "options ATA_STATIC_ID" from your kernel config
> before building the new kernel and rebooting. Then your
> first disk will be ad0, no matter what controller and
> channel it is connected to. Be sure to update your
> /etc/fstab file.
Ah, excellent - that's what I was looking for. Thanks!
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