Date: Sun, 31 May 2009 15:01:20 +0200 From: "Enrico M." <enricom@teppisti.it> To: freebsd-stable@freebsd.org Subject: Re: ZFS booting without partitions (was: ZFS boot on zfs mirror) Message-ID: <200905311501.21029.enricom@teppisti.it> In-Reply-To: <A1B19FAF-B574-484F-9434-17F5AF754B88@yellowspace.net> References: <29579856-69F7-4CDC-A52A-B414A40180ED@yellowspace.net> <18972.7173.216763.407615@already.dhcp.gene.com> <A1B19FAF-B574-484F-9434-17F5AF754B88@yellowspace.net>
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On Thursday 28 May 2009 15:58:04 Lorenzo Perone wrote: > Hi, > > I tried hard... but without success ;( > > the result is, when choosing the disk with the zfs boot > sectors in it (in my case F5, which goes to ad6), the kernel > is not found. the console shows: > > forth not found > definitions not found > only not found > (the above repeated several times) > > can't load 'kernel' > > and I get thrown to the loader prompt. > lsdev does not show any ZFS devices. > > Strange thing: if I boot from the other disk, F1, which is my > ad4 containing the normal ufs system I used to make up the other > one, and escape to the loader prompt, lsdev actually sees the > zpool which is on the other disk, and shows: > zfs0: tank > > I tried booting with boot zfs:tank or zfs:tank:/boot/kernel/kernel, > but there I get the panic: free: guard1 fail message. > (would boot zfs:tank:/boot/kernel/kernel be correct, anyways?) > > Sure I'm doing something wrong, but what...? Is it a problem that > the pool is made out of the second disk only (ad6)? > > Here are my details (note: latest stable and biosdisk.c merged > with changes shown in r185095. no problems in buildworld/kernel): > > <snip> > > Machine: p4 4GHz 4 GB RAM (i386) > > Note: the pool has actually a different name (heidi > instead of tank, if this can be of any relevance...), > just using tank here as it's one of the conventions... > > mount (just to show my starting situation) > > /dev/mirror/gm0s1a on / (ufs, local) > devfs on /dev (devfs, local) > /dev/mirror/gm0s1e on /tmp (ufs, local, soft-updates) > /dev/mirror/gm0s1f on /usr (ufs, local, soft-updates) > /dev/mirror/gm0s1d on /var (ufs, local, soft-updates) > > gmirror status > Name Status Components > mirror/gm0 DEGRADED ad4 > (ad6 used to be the second disk...) > > echo 'LOADER_ZFS_SUPPORT=yes' >> /etc/make.conf > > cd /usr/src > make buildworld && make buildkernel KERNCONF=HEIDI > make installkernel KERNCONF=HEIDI > mergemaster > make installworld > shutdown -r now > > dd if=/dev/zero of=/dev/ad6 bs=512 count=32 > > zpool create tank ad6 > zfs create tank/usr > zfs create tank/var > zfs create -V 4gb tank/swap > zfs set org.freebsd:swap=on tank/swap > zpool set bootfs=tank tank > > rsync -avx / /tank > rsync -avx /usr/ /tank/usr > rsync -avx /var/ /tank/var > cd /usr/src > make installkernel KERNCONF=HEIDI DESTDIR=/tank > > zpool export tank > > dd if=/boot/zfsboot of=/dev/ad6 bs=512 count=1 > dd if=/boot/zfsboot of=/dev/ad6 bs=512 skip=1 seek=1024 > > zpool import tank > > zfs set mountpoint=legacy tank > zfs set mountpoint=/usr tank/usr > zfs set mountpoint=/var tank/var > > shutdown -r now ... > > at the 'mbr prompt' I pressed F5 (the second disk, ad6) > .. as written above, loader gets loaded (at this stage > I suppose it's the stuff dd't after block 1024?), > but kernel not found. > > /usr/src/sys/i386/conf/HEIDI: > (among other things...): > options KVA_PAGES=512 > > (/tank)/boot/loader.conf: > vm.kmem_size="1024M" > vm.kmem_size_max="1024M" > vfs.zfs.arc_max="128M" > vfs.zfs.vdev.cache.size="8M" > vfs.root.mountfrom="zfs:tank" > > (/tank)/etc/fstab: > # Device Mountpoint FStype Options Dump Pass# > tank / zfs rw 0 0 > /dev/acd0 /cdrom cd9660 ro,noauto 0 0 > > </snap> > > any help is welcome... don't know where to go from here right now. > > BTW: I can't stop thanking the team for the incredible > pace at which bugs are fixed these days! > > > Regards, > > Lorenzo > > On 26.05.2009, at 18:42, George Hartzell wrote: > > Andriy Gapon writes: > >> on 26/05/2009 19:21 George Hartzell said the following: > >>> Dmitry Morozovsky writes: > >>>> On Tue, 26 May 2009, Mickael MAILLOT wrote: > >>>> > >>>> MM> Hi, > >>>> MM> > >>>> MM> i prefere use zfsboot boot sector, an example is better than > >>>> a long talk: > >>>> MM> > >>>> MM> $ zpool create tank mirror ad4 ad6 > >>>> MM> $ zpool export tank > >>>> MM> $ dd if=/boot/zfsboot of=/dev/ad4 bs=512 count=1 > >>>> MM> $ dd if=/boot/zfsboot of=/dev/ad6 bs=512 count=1 > >>>> MM> $ dd if=/boot/zfsboot of=/dev/ad4 bs=512 skeep=1 seek=1024 > >>>> MM> $ dd if=/boot/zfsboot of=/dev/ad6 bs=512 skeep=1 seek=1024 > >>>> > >>>> s/skeep/skip/ ? ;-) > >>> > >>> What is the reason for copying zfsboot one bit at a time, as opposed > >>> to > >>> > >>> dd if=/boot/zfsboot of=/dev/ad4 bs=512 count=2 > >> > >> seek=1024 for the second part? and no 'count=1' for it? :-) > >> > >> [Just guessing] Apparently the first block of zfsboot is some form > >> of MBR and the > >> rest is zfs-specific code that goes to magical sector 1024. > > > > Ok, I managed to read the argument to seek as "one block", apparently > > my coffee hasn't hit yet. > > > > I'm still confused about the two parts of zfsboot and what's magical > > about seeking to 1024. > > > > g. I obtained the same result with FreeBSD 7 stable. I installed first a new system in a scsi disk with ufs I put LOADER_ZFS_SUPPORT=yes in /etc/make.conf, updated src and made buildworld without trouble. I built a new kernel, installed it and installed new world. Until here, that's all right Then, I tried with a PATA hard drive, ad2 I resetted the mbr and the partition table with dd if=/dev/zero of=/dev/ad2 bs=512 count=63 I created a new pool and filesystems: zpool create test ad2 zfs create test/usr zfs create test/var zfs create test/tmp zfs create test/home zfs create test/root zfs create -V 1gb test/swap zfs set org.freebsd:swap=on test/swap zpool set bootfs=test test So, I copied the system in the pool: find -x / | cpio -pmd /test ... and put "vfs.root.mountfrom=zfs:test" in /test/boot/loader.conf I set the mountpoints: zfs set mountpoint=/usr test/usr ....... and installed the zfsboot: zpool export test dd if=/boot/zfsboot of=/dev/ad2 bs=512 count=1 dd if=/boot/zfsboot of=/dev/ad2 bs=512 skip=1 seek=1024 zpool import test Help me, please Enrico
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