GPT boot with ZFS RAIDZ "ZFS: i/o error - all block copies
unavailable"
Jonathan
jonathan at kc8onw.net
Fri Jun 26 03:57:10 UTC 2009
I've tried so many things today I don't even remember them all but I
will try to make the list as complete as I can.
I recently purchased a new server with 3 450GB SAS drives on an mfi
controller and 2 Xeon 5550 processors. I'm trying to install FreeBSD
current with a ZFS RAIDZ pool booting from GPT.
I have a USB drive booting ZFS based on the 200905 current snapshot. I
downloaded the latest svn source and built it. LOADER_ZFS_SUPPORT=YES
was set for the build.
Once the build was complete I did the following to create and populate
the pool on the 3 SAS drives while booted from the USB drive:
gpart create -s GPT mfid[0-2]
gpart show mfid0 # to get sector count
gpart add -b 34 -s 128 -t freebsd-boot mfid[0-2]
gpart add -b 162 -s 876,951,323 -t freebsd-zfs mfid[0-2]
gpart bootcode -b /usr/obj/amd64/usr/src/sys/boot/i386/pmbr/pmbr -p
/usr/obj/amd64/usr/src/sys/boot/i386/gptzfsboot/gptzfsboot -i 1 mfid[0-2]
zpool create serenity raidz /dev/mfid[0-2]p2
make installworld TARGET=amd64 DESTDIR=/serenity
make installkernel TARGET=amd64 DESTDIR=/serenity
mergemaster -D /serenity/etc/ -i
created an empty fstab
copied /boot/zfs/zpool.cache to the new pool
I did not export the pool as some searching showed that this will cause
the boot to fail.
I currently seem to be having 2 issues. One is that I get several
screenfulls of "error 1 lba xxx" with numbers like 4292179434 and
4292179446. Similar errors were reported here
http://lists.freebsd.org/pipermail/freebsd-fs/2008-December/005511.html
but I did not find anything in that thread that worked for me. The
error message itself comes from here
http://svn.freebsd.org/viewvc/base/head/sys/boot/i386/gptboot/gptboot.c?revision=181436&view=markup
The loader then proceeds to load the kernel, opensolaris, and zfs
modules. Right before the displaying the loader menu it shows the
message "ZFS: i/o error - all block copies unavailable" which comes from
here
http://svn.freebsd.org/viewvc/base/head/sys/boot/zfs/zfsimpl.c?revision=192194&view=markup
If I continue from the loader screen the kernel loads and initializes
and fails with
"Trying to mount root from zfs:serenity
ROOT MOUNT ERROR:
If you have invalid"...
"Loader variables:
vfs.root.mountfrom=zfs:serenity
zfs.root.mountfrom.options="
At this point I can't do anything because the USB keyboard does not
respond and the system has no PS/2 ports.
I'd love to get this working and any help is much appreciated. I still
have the USB drive booting the 200905 snapshot and the livefs DVD
snapshot available.
Thanks,
Jonathan
P.S. if someone wants to do some testing on a 16 core machine with 6GB
of RAM please let me know. I have a week or so to play with the machine.
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