From: Jimmy@disposable.invalid   
      
   On 08/09/2021 07:24 PM, Mike Small wrote:   
   > Jimmy Johnson  writes:   
   >   
   >> On 8/6/21 12:40 PM, Mike Small wrote:   
   >>   
   >>> Grub can boot kernels off of a btrfs system. It has modules for   
   >>> that. There should have been an insmod line in your boot entry where you   
   >>> tell Grub to load the btrfs grub module, similar to how you might have   
   >>> had one to load its ext2 module. Then you would have needed the linux   
   >>> btrfs module loaded into linux at initrd time so it can mount root from   
   >>> btrfs.   
   >>   
   >> What is this insmod line? where can I find an example? I was thinking   
   >> there should be someway, but I could not find it. In my search I'm   
   >> finding way to much I don't understand. I see things like btrfs grub   
   >> module won't fit in the mbr. And btrfs-grub. By the way, I still use   
   >> legacy-grub.   
   >>   
   >   
   > Sorry if you'd mentioned in the original post that your attempt was   
   > against grub 0.97 and I missed it. I imagine no one has updated that for   
   > btrfs.   
      
   The system I use to install grub-legacy allows using the btrfs file   
   system, I don't know if it would do any good to install btrfs on it   
   though. I went back to using ext4 with a new install of slackware   
   current, I'll probably try this again at a later date, but there's just   
   to much going on right now.   
      
   > In case you are willing to use grub2 instead this is what my btrfs boot   
   > entry looks like as generated by Debian. As usual with Debian   
   > configuration it could use some toning down and tidying up:   
   >   
   > menuentry "Debian" {   
   >          load_video   
   >          insmod gzio   
   >          insmod part_msdos   
   >          insmod btrfs   
   >          set root='hd0,msdos5'   
   >          if [ x$feature_platform_search_hint = xy ]; then   
   >            search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos5   
   --hint-efi=hd0,msdos5 --hint-baremetal=ahci0,msdos5  b906d859-de   
   8-4ae0-a5a7-ff349ad16df1   
   >          else   
   >            search --no-floppy --fs-uuid --set=root b906d859-de   
   8-4ae0-a5a7-ff349ad16df1   
   >          fi   
   >          echo    'Loading Linux 4.19.0-6-amd64 ...'   
   >          linux   /boot/vmlinuz-4.19.0-6-amd64 root=UUID=b906d8   
   9-dea8-4ae0-a5a7-ff349ad16df1 ro   
   >          echo    'Loading initial ramdisk ...'   
   >          initrd  /boot/initrd.img-4.19.0-6-amd64   
   > }   
   >   
   > insmod must stand for insert module. This isn't a linux kernel module   
   > but a module of grub 2 code. Grub 2 manages to be slightly less gargantuan   
   > by using modules in a similar way to how Linux does.   
   >   
   > - Mike Sm.   
      
   Thanks for your post Mike, you've given me some things to think about.   
   --   
   Jimmy Johnson   
      
   Alien Linux - AMD A8-7600 - at sda11   
   Registered Linux User #380263   
      
   --- SoupGate-Win32 v1.05   
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