grub2 lvm2 raid1 /boot Announcing the arrival of Valued Associate #679: Cesar Manara Planned maintenance scheduled April 17/18, 2019 at 00:00UTC (8:00pm US/Eastern) 2019 Community Moderator Election Results Why I closed the “Why is Kali so hard” questionGrub2 RAID /bootRaid5 + LVM2 + grub2: final config and bootTransfer 2 drive raid0 / lvm2 system to new drive pairBooting off raid'ed > 2GB drives, btrfs, handling bios boot partitionRAID-1 / LVM server won't boot after power outageGRUB2 fails sometimes on USB bootable diskLVM RAID1 adding two more disksHow to mount mdadm RAID1 file systembtrfs raid1 not using all disks?Install grub2 on LVM partition

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grub2 lvm2 raid1 /boot



Announcing the arrival of Valued Associate #679: Cesar Manara
Planned maintenance scheduled April 17/18, 2019 at 00:00UTC (8:00pm US/Eastern)
2019 Community Moderator Election Results
Why I closed the “Why is Kali so hard” questionGrub2 RAID /bootRaid5 + LVM2 + grub2: final config and bootTransfer 2 drive raid0 / lvm2 system to new drive pairBooting off raid'ed > 2GB drives, btrfs, handling bios boot partitionRAID-1 / LVM server won't boot after power outageGRUB2 fails sometimes on USB bootable diskLVM RAID1 adding two more disksHow to mount mdadm RAID1 file systembtrfs raid1 not using all disks?Install grub2 on LVM partition



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1















Is it possible to boot from a system where /boot is located within an lvm2 raid1 partition. I've tried a variety of configurations, but I have yet to discover how to do it.



I am using two 2TB disks. Each disk contains a GPT partition table with a 1MB bios_grub partition and a 2TB partition. The large 2TB partition on each disk is allocated as a physical volume to lvm2.



I am using Ubuntu 14.04 LTS as my OS. Initially I configured Ubuntu with two 5GB logical volumes. The first one for / and the second for /home. The Ubuntu setup did not have options to configure these logical volumes with a segment type of raid1. So, I just installed it with what it defaulted to, which was linear. This worked fine and the system booted without any issues.



I then rebooted into a live CD environment, and converted the two partitions into raid1 with the following commands.



lvconvert --type raid1 -m1 /dev/vg_storage/os_root
lvconvert --type raid1 -m1 /dev/vg_storage/os_home


These operations completed without any errors. I then monitored the progress of lvm2 mirroring both of these logical volumes until copy% was 100%



root@ubuntu:~# lvs
LV VG Attr LSize Pool Origin Data% Move Log Copy% Convert
os_home vg_storage rwi-a-r-- 4.66g 100.00
os_root vg_storage rwi-a-r-- 4.66g 100.00


Now the system fails to boot. I get the following error immediately after BIOS attempts to boot from the first of the two disks. And I am left with a grub rescue prompt.



error: disk 'lvmid/L1VIor-PKIM-mtCO-TUQ2-iWe2-ndnY-df2wOu/yCDXMZ-2q4X-jbJJ-qZhI-sHNL-hrjw-Q5bg6v' not found.
Entering rescue mode...
grub rescue>


I'm thinking there is a grub2 module that isn't being loaded. One that supports the raid1 functionality of lvm2. Either that or such support does not yet exist within grub2.










share|improve this question




























    1















    Is it possible to boot from a system where /boot is located within an lvm2 raid1 partition. I've tried a variety of configurations, but I have yet to discover how to do it.



    I am using two 2TB disks. Each disk contains a GPT partition table with a 1MB bios_grub partition and a 2TB partition. The large 2TB partition on each disk is allocated as a physical volume to lvm2.



    I am using Ubuntu 14.04 LTS as my OS. Initially I configured Ubuntu with two 5GB logical volumes. The first one for / and the second for /home. The Ubuntu setup did not have options to configure these logical volumes with a segment type of raid1. So, I just installed it with what it defaulted to, which was linear. This worked fine and the system booted without any issues.



    I then rebooted into a live CD environment, and converted the two partitions into raid1 with the following commands.



    lvconvert --type raid1 -m1 /dev/vg_storage/os_root
    lvconvert --type raid1 -m1 /dev/vg_storage/os_home


    These operations completed without any errors. I then monitored the progress of lvm2 mirroring both of these logical volumes until copy% was 100%



    root@ubuntu:~# lvs
    LV VG Attr LSize Pool Origin Data% Move Log Copy% Convert
    os_home vg_storage rwi-a-r-- 4.66g 100.00
    os_root vg_storage rwi-a-r-- 4.66g 100.00


    Now the system fails to boot. I get the following error immediately after BIOS attempts to boot from the first of the two disks. And I am left with a grub rescue prompt.



    error: disk 'lvmid/L1VIor-PKIM-mtCO-TUQ2-iWe2-ndnY-df2wOu/yCDXMZ-2q4X-jbJJ-qZhI-sHNL-hrjw-Q5bg6v' not found.
    Entering rescue mode...
    grub rescue>


    I'm thinking there is a grub2 module that isn't being loaded. One that supports the raid1 functionality of lvm2. Either that or such support does not yet exist within grub2.










    share|improve this question
























      1












      1








      1


      2






      Is it possible to boot from a system where /boot is located within an lvm2 raid1 partition. I've tried a variety of configurations, but I have yet to discover how to do it.



      I am using two 2TB disks. Each disk contains a GPT partition table with a 1MB bios_grub partition and a 2TB partition. The large 2TB partition on each disk is allocated as a physical volume to lvm2.



      I am using Ubuntu 14.04 LTS as my OS. Initially I configured Ubuntu with two 5GB logical volumes. The first one for / and the second for /home. The Ubuntu setup did not have options to configure these logical volumes with a segment type of raid1. So, I just installed it with what it defaulted to, which was linear. This worked fine and the system booted without any issues.



      I then rebooted into a live CD environment, and converted the two partitions into raid1 with the following commands.



      lvconvert --type raid1 -m1 /dev/vg_storage/os_root
      lvconvert --type raid1 -m1 /dev/vg_storage/os_home


      These operations completed without any errors. I then monitored the progress of lvm2 mirroring both of these logical volumes until copy% was 100%



      root@ubuntu:~# lvs
      LV VG Attr LSize Pool Origin Data% Move Log Copy% Convert
      os_home vg_storage rwi-a-r-- 4.66g 100.00
      os_root vg_storage rwi-a-r-- 4.66g 100.00


      Now the system fails to boot. I get the following error immediately after BIOS attempts to boot from the first of the two disks. And I am left with a grub rescue prompt.



      error: disk 'lvmid/L1VIor-PKIM-mtCO-TUQ2-iWe2-ndnY-df2wOu/yCDXMZ-2q4X-jbJJ-qZhI-sHNL-hrjw-Q5bg6v' not found.
      Entering rescue mode...
      grub rescue>


      I'm thinking there is a grub2 module that isn't being loaded. One that supports the raid1 functionality of lvm2. Either that or such support does not yet exist within grub2.










      share|improve this question














      Is it possible to boot from a system where /boot is located within an lvm2 raid1 partition. I've tried a variety of configurations, but I have yet to discover how to do it.



      I am using two 2TB disks. Each disk contains a GPT partition table with a 1MB bios_grub partition and a 2TB partition. The large 2TB partition on each disk is allocated as a physical volume to lvm2.



      I am using Ubuntu 14.04 LTS as my OS. Initially I configured Ubuntu with two 5GB logical volumes. The first one for / and the second for /home. The Ubuntu setup did not have options to configure these logical volumes with a segment type of raid1. So, I just installed it with what it defaulted to, which was linear. This worked fine and the system booted without any issues.



      I then rebooted into a live CD environment, and converted the two partitions into raid1 with the following commands.



      lvconvert --type raid1 -m1 /dev/vg_storage/os_root
      lvconvert --type raid1 -m1 /dev/vg_storage/os_home


      These operations completed without any errors. I then monitored the progress of lvm2 mirroring both of these logical volumes until copy% was 100%



      root@ubuntu:~# lvs
      LV VG Attr LSize Pool Origin Data% Move Log Copy% Convert
      os_home vg_storage rwi-a-r-- 4.66g 100.00
      os_root vg_storage rwi-a-r-- 4.66g 100.00


      Now the system fails to boot. I get the following error immediately after BIOS attempts to boot from the first of the two disks. And I am left with a grub rescue prompt.



      error: disk 'lvmid/L1VIor-PKIM-mtCO-TUQ2-iWe2-ndnY-df2wOu/yCDXMZ-2q4X-jbJJ-qZhI-sHNL-hrjw-Q5bg6v' not found.
      Entering rescue mode...
      grub rescue>


      I'm thinking there is a grub2 module that isn't being loaded. One that supports the raid1 functionality of lvm2. Either that or such support does not yet exist within grub2.







      boot grub2 lvm raid1






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked Feb 27 '15 at 15:58









      Davidian1024Davidian1024

      63




      63




















          1 Answer
          1






          active

          oldest

          votes


















          0














          Four years go by and...



          yes, boot from mirrored LVM volume (lvconvert -m1 /dev/vg0/root) works for us in Debian 9 (stretch). GRUB lvm.mod module understands mirrored LVN volumes out of box, GRUB successfully reads /boot/grub/grub.cfg which resides on the mirrored root volume, presents the boot menu, loads the kernel and initrd. Then it gets stuck, unable to mount LVM root. This is solved by adding the following modules to /etc/initramfs-tools/modules (order matters), and running update-initramfs:



          xor
          async_tx
          raid6_pq
          async_xor
          async_pq
          async_memcpy
          async_raid6_recov
          md_mod
          raid1
          raid456
          dm_raid
          dm_log
          dm_region_hash
          dm_mirror
          lvm


          (probably one can leave out raid6_pq, async_raid6_recov, raid456 -- I cannot verify right now).



          Now the mirrored LVM root should mount OK. The final step is to make both physical disks bootable, so should any one of them fail, the other will still boot the system:



          lvdisplay -m /dev/vg0/root # find out which physical disks root lv resides on
          grub-install /dev/firstdisk
          grub-install /dev/seconddisk





          share|improve this answer








          New contributor




          sizif is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
          Check out our Code of Conduct.




















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            active

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            0














            Four years go by and...



            yes, boot from mirrored LVM volume (lvconvert -m1 /dev/vg0/root) works for us in Debian 9 (stretch). GRUB lvm.mod module understands mirrored LVN volumes out of box, GRUB successfully reads /boot/grub/grub.cfg which resides on the mirrored root volume, presents the boot menu, loads the kernel and initrd. Then it gets stuck, unable to mount LVM root. This is solved by adding the following modules to /etc/initramfs-tools/modules (order matters), and running update-initramfs:



            xor
            async_tx
            raid6_pq
            async_xor
            async_pq
            async_memcpy
            async_raid6_recov
            md_mod
            raid1
            raid456
            dm_raid
            dm_log
            dm_region_hash
            dm_mirror
            lvm


            (probably one can leave out raid6_pq, async_raid6_recov, raid456 -- I cannot verify right now).



            Now the mirrored LVM root should mount OK. The final step is to make both physical disks bootable, so should any one of them fail, the other will still boot the system:



            lvdisplay -m /dev/vg0/root # find out which physical disks root lv resides on
            grub-install /dev/firstdisk
            grub-install /dev/seconddisk





            share|improve this answer








            New contributor




            sizif is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
            Check out our Code of Conduct.
























              0














              Four years go by and...



              yes, boot from mirrored LVM volume (lvconvert -m1 /dev/vg0/root) works for us in Debian 9 (stretch). GRUB lvm.mod module understands mirrored LVN volumes out of box, GRUB successfully reads /boot/grub/grub.cfg which resides on the mirrored root volume, presents the boot menu, loads the kernel and initrd. Then it gets stuck, unable to mount LVM root. This is solved by adding the following modules to /etc/initramfs-tools/modules (order matters), and running update-initramfs:



              xor
              async_tx
              raid6_pq
              async_xor
              async_pq
              async_memcpy
              async_raid6_recov
              md_mod
              raid1
              raid456
              dm_raid
              dm_log
              dm_region_hash
              dm_mirror
              lvm


              (probably one can leave out raid6_pq, async_raid6_recov, raid456 -- I cannot verify right now).



              Now the mirrored LVM root should mount OK. The final step is to make both physical disks bootable, so should any one of them fail, the other will still boot the system:



              lvdisplay -m /dev/vg0/root # find out which physical disks root lv resides on
              grub-install /dev/firstdisk
              grub-install /dev/seconddisk





              share|improve this answer








              New contributor




              sizif is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
              Check out our Code of Conduct.






















                0












                0








                0







                Four years go by and...



                yes, boot from mirrored LVM volume (lvconvert -m1 /dev/vg0/root) works for us in Debian 9 (stretch). GRUB lvm.mod module understands mirrored LVN volumes out of box, GRUB successfully reads /boot/grub/grub.cfg which resides on the mirrored root volume, presents the boot menu, loads the kernel and initrd. Then it gets stuck, unable to mount LVM root. This is solved by adding the following modules to /etc/initramfs-tools/modules (order matters), and running update-initramfs:



                xor
                async_tx
                raid6_pq
                async_xor
                async_pq
                async_memcpy
                async_raid6_recov
                md_mod
                raid1
                raid456
                dm_raid
                dm_log
                dm_region_hash
                dm_mirror
                lvm


                (probably one can leave out raid6_pq, async_raid6_recov, raid456 -- I cannot verify right now).



                Now the mirrored LVM root should mount OK. The final step is to make both physical disks bootable, so should any one of them fail, the other will still boot the system:



                lvdisplay -m /dev/vg0/root # find out which physical disks root lv resides on
                grub-install /dev/firstdisk
                grub-install /dev/seconddisk





                share|improve this answer








                New contributor




                sizif is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
                Check out our Code of Conduct.










                Four years go by and...



                yes, boot from mirrored LVM volume (lvconvert -m1 /dev/vg0/root) works for us in Debian 9 (stretch). GRUB lvm.mod module understands mirrored LVN volumes out of box, GRUB successfully reads /boot/grub/grub.cfg which resides on the mirrored root volume, presents the boot menu, loads the kernel and initrd. Then it gets stuck, unable to mount LVM root. This is solved by adding the following modules to /etc/initramfs-tools/modules (order matters), and running update-initramfs:



                xor
                async_tx
                raid6_pq
                async_xor
                async_pq
                async_memcpy
                async_raid6_recov
                md_mod
                raid1
                raid456
                dm_raid
                dm_log
                dm_region_hash
                dm_mirror
                lvm


                (probably one can leave out raid6_pq, async_raid6_recov, raid456 -- I cannot verify right now).



                Now the mirrored LVM root should mount OK. The final step is to make both physical disks bootable, so should any one of them fail, the other will still boot the system:



                lvdisplay -m /dev/vg0/root # find out which physical disks root lv resides on
                grub-install /dev/firstdisk
                grub-install /dev/seconddisk






                share|improve this answer








                New contributor




                sizif is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
                Check out our Code of Conduct.









                share|improve this answer



                share|improve this answer






                New contributor




                sizif is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
                Check out our Code of Conduct.









                answered 10 hours ago









                sizifsizif

                1




                1




                New contributor




                sizif is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
                Check out our Code of Conduct.





                New contributor





                sizif is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
                Check out our Code of Conduct.






                sizif is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
                Check out our Code of Conduct.



























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