Date: Wed, 25 Sep 2013 03:46:51 -0500 From: Tyler Sweet <tyler@tsweet.net> To: Terje Elde <terje@elde.net> Cc: "freebsd-questions@freebsd.org" <freebsd-questions@freebsd.org> Subject: Re: FreeBSD 8.4 Boot failure Message-ID: <CAN9eEw67QfJeuGRmntfRFd1DhoGOj691ur%2BjGDcb31T_mydF7A@mail.gmail.com> In-Reply-To: <BC371B7C-CD14-4F07-8474-BCAB3DE93A7B@elde.net> References: <CAN9eEw5CAKQhcp746seAMWQ9q3J%2BEro%2BrZSNymVL=-6U7tnXnQ@mail.gmail.com> <BC371B7C-CD14-4F07-8474-BCAB3DE93A7B@elde.net>
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Luckily, in this case, I had set a cron job long, long ago to do daily snapshots. So I have a snapshot from before the upgrade - There are indeed two different loaders. The newer one matches "zfs" when grepped, the older one does not... But, since it was working before, I restored the older loader and tried to boot again. No dice - it still sticks at that screen where all I see is "/" in the upper left. I also tried putting the older zfsboot and zfsloader back in place (with the old loader) to try and get a different error - still no dice. I'm still stuck wondering if that screen is from FreeBSD attempting to boot, or from the BIOS - but nothing changed for booting, as far as I know. I'll poke through the BIOS more tomorrow as well to see if some option got reset during a power-off. I'll get a more thorough look at what all changed in /boot tomorrow too, and get a list of all the files. It's almost 4am here and I have to work tomorrow :) (well, today I suppose). I'll also check to see if I can find anything about if zfs boot works differently in 8.4 vs 8.3 and older, as I may not have rebooted after the final "freebsd-update install" command (I *think* I did, but my memory gets fuzzy). Thanks for the input! I hope you have a good morning, and I'll let you know tomorrow/later today with anything new and interesting I find :) On Wed, Sep 25, 2013 at 1:45 AM, Terje Elde <terje@elde.net> wrote: > On 25. sep. 2013, at 06:59, Tyler Sweet <tyler@tsweet.net> wrote: >> I tried reinstalling the boot blocks from both >> the fixit live filesystem and also mounting zroot and using the files >> there in case they were different. > > Disclaimer: I haven't gotten (enough) morning-coffee yet, but... > > Disclaimer 2: at times tracking how zfs-booting is done in the different versions can be a bit tricky. This is a moving target, and I've lost track of the 8-branch. > > That said, assuming you have the correct bootcode (gptzfsboot), here's what might have happened: > > You installed 8.2, with a loader supporting zfs. Then you upgraded your /boot-stuffs, and bootcode on disk (correctly), but got left with a loader without zfs support. Then tried to upgrade the bootcode, but you're still left with a loader not supporting zfs. > > If I recall correctly, then the zfs-bootcode for 9+ will use "zfsloader" (supporting zfs and built by default), while earlier versions depend on "loader" with zfs support (built without by default). > > If that's the case, you could dump LOADER_ZFS_SUPPORT into /etc/make.conf and rebuild/reinstall it, or install /boot/loader from the fixit (if it has zfs support in 8.4). > > That's my first thought at least... If that doesn't fix it (remember backups of any files you replace or upgrade), it'd be interesting to see the output of: > ls -l /boot/*loader /boot/*boot > On the /boot you're using. Anything that didn't get built or installed? > > Also, did you snapshot your zfs before upgrading? Could be a working /boot/loader there, which might be the easiest way to get the system up, before rebuilding with ZFS-capable loader... if I'm right, which isn't a given (ref disclaimers). > > Terje >help
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