Updating 7.1 kernel using zfs root
Andrew Moran
amoran at forsythia.net
Fri Feb 27 01:14:04 PST 2009
Hey guys,
I'm currently running on FreeBSD 7.1 AMD64 using a ZFS filesystem, but
my /boot folder is linked to a UFS filesytem (/bootdir). I set it
up following the instructions here:
http://www.ish.com.au/solutions/articles/freebsdzfs
In a nut shell: Install a minimal FreeBSd 7.1 from CDs onto a UFS
partition, boot into single user mode, create your ZFS partitions, and
copy stuff over onto ZFS, and link back to the UFS boot's folder for /
boot.
So:
celebrian# ls -ld /boot
lrwxr-xr-x 1 root wheel 12 Feb 25 19:52 /boot -> bootdir/boot
celebrian# df
Filesystem 1K-blocks Used Avail Capacity Mounted on
tonk/root 572796032 817920 571978112 0% /
devfs 1 1 0 100% /dev
/dev/ad10s1a 1012974 560070 371868 60% /bootdir
tonk/home 699041408 127063296 571978112 18% /home
tonk/tmp 571979264 1152 571978112 0% /tmp
tonk/usr 575095040 3116928 571978112 1% /usr
tonk/usr/local 572981248 1003136 571978112 0% /usr/local
tonk/var 572786432 808320 571978112 0% /var
celebrian#
All is working now except when trying to recompile the kernel. I
csup the latest 7.1 kernel (cvs tag RELENG_7), and I do the whole
buildworld, buildkernel, installkernel, shutdown, installworld dance..
everything builds and installs fine. I do see it installs into /boot/
kernel (which is really /bootdir/boot/kernel) and moves aside the old
kernel. When I reboot, it kernel panics pretty quickly (it spits out
a whole bunch of weird stuff including strange symbols) shortly after
the boot loader. Fortunately, I'm able to boot into the kernel.old
kernel (the one from the CDs) just fine.
Is there some extra step I need to do in this kind of setup to update
the kernel that I'm missing?
Any clues would be appreciated.
--Andy
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