How to predict drive number change for 7.3->8.1 upgrade?
Marat N.Afanasyev
amarat at ksu.ru
Fri Sep 17 14:21:48 UTC 2010
Michael Sperber wrote:
>
> "Marat N.Afanasyev"<amarat at ksu.ru> writes:
>
>> Michael Sperber wrote:
>>>
>>> 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!
>>>
>> beware of drago^Wchanging of adX numbers each time you add/remove
>> drive ;) It's better to label filesystems, imho ;)
>
> This is a rented server, so I no drive will ever be removed or added.
> On the other hand, if I understand it correctly, I'll need to unmount
> the root partition in order to label it - right?
>
you may try the following commands:
sysctl kern.geom.debugflags=16
foreach fs (your-filesystems)
glabel label your-$fs-label your-$fs-device
end
echo geom_label_load="YES" >> /boot/loader.conf
reboot
and see if the labels appear in /dev/label
--
SY, Marat
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