On Friday 31 July 2015 13:33:18 I wrote: > On Friday 31 July 2015 06:44:54 Rich Freeman wrote: > > As Neil already pointed out, if you're not using an initramfs you need > > to put all your devices on this line if they're part of an array. The > > kernel will not scan to find the others. > > I didn't mention it the first time but I'd already tried > device=/dev/sda3,device=/dev/sdb3 on the command line and it didn't help. > I'd also tried the initramfs but that didn't help either. I'll try them > again.
This time I tried "device=/dev/sda3,/dev/sdb3" in case that was the proper syntax, but it made no discernible difference - the final message from the kernel panic was the same "VFS: Unable to mount roofs on unknown-block(8,3)". --->8 > > I believe that as long as dracut can find the btrfs utility it will > > put it in the initramfs. Indeed it did so for me (this was today when I ran "dracut --kver 4.0.5-gentoo" again: # lsinitrd -k 4.0.5-gentoo | grep btr btrfs -rwxr-xr-x 1 root root 142 Jun 15 11:27 lib64/dracut/hooks/initqueue/timeout/10-btrfs_timeout.sh -rw-r--r-- 1 root root 418 Apr 26 14:07 lib64/udev/rules.d/64-btrfs.rules -rwxr-xr-x 1 root root 427048 Jul 31 13:39 sbin/btrfs -rwxr-xr-x 1 root root 427048 Jul 31 13:39 sbin/btrfsck -rwxr-xr-x 1 root root 187384 Jul 31 13:39 sbin/btrfs-zero-log -rwxr-xr-x 1 root root 1196 Jul 30 08:50 sbin/fsck.btrfs > > Otherwise there isn't much more to this I've been thinking that for a few days now :) > > I think these two issues are the only real problems you're having, > > depending on which route you decide to take with the initramfs (which I > > still recommend, but you could of course have separate grub lines to boot > > with and without it if you want to experiment). Yes, I'm playing with two grub entries, of which one tries devices= and the other includes this line (is the syntax right? The file does exist): initrd /boot/initramfs-4.0.5-gentoo.img In the case of the initramfs the 8,3 in the kernel panic message becomes 8,19. Is that a useful clue? Another wobbler: as far as I can remember I haven't done anything about compression, but could it have crept in somewhere? And another: my dicky memory says that after booting SysRescCD to lay out the new partitions and restore my rescue system, I booted the latter to do the rest of the work, including mkfs.btrfs. Perhaps I should start again right from the beginning but using SysRescCD's mkfs.btrfs. That'll be another day's work. -- Rgds Peter
