update-grub gets confused when other pools are created before rpool

debian 7.8 stable
zfs & tools from debian repo

grub 2.01-22debian1+zfs3-0.6.3-2wheezy
zfs 0.6.3-1wheezy

I created a zfs mirror pool, mounted on /home
I then partitioned a drive with 6gb swap and remaining space as zfs root pool, with a mount point at /
temp mounted under /mnt
copied root partition to zfs root, chrooted into it, and ran grub install & update-grub
update-grub ran but only found linux images on the /home zpool and current boot drive

exported both pools, then imported rpool, then home pool.
chroot into rpool and update-grub found the correct images.
lz4 was enabled at pool creation, grub booted into it without issue
bios mode used, not EFI

The first time I did not enable the boot bit on /dev/sdc2 (the rpool) but enabled it the 2nd try.

this is cirdan on irc, btw 👍

From earlier conversation on IRC:

/dev/mapper/lothlorien-root on / type xfs (rw,relatime,attr2,delaylog,noquota)
/dev/sdb1 on /boot type ext2 (rw,relatime,errors=continue)

mir-300gb/ROOT/home-1 on /home type zfs (rw,relatime,xattr,noacl)
mir-300gb on /mnt/mir-300gb type zfs (rw,relatime,xattr,noacl)
mir-300gb/ROOT on /mnt/mir-300gb/ROOT type zfs (rw,relatime,xattr,noacl)

lothlorien/ROOT/debian-1 on /mnt/lorien type zfs (rw,relatime,xattr,noacl)
lothlorien on /mnt/lorien/lothlorien type zfs (rw,relatime,xattr,noacl)
lothlorien/ROOT on /mnt/lorien/lothlorien/ROOT type zfs (rw,relatime,xattr,noacl)

sudo zpool status
  pool: lothlorien
 state: ONLINE
  scan: none requested
config:

        NAME                                    STATE     READ WRITE CKSUM
        lothlorien                              ONLINE       0     0     0
          scsi-SATA_ST3200827AS_5ND5LK04-part2  ONLINE       0     0     0

errors: No known data errors

  pool: mir-300gb
 state: ONLINE
  scan: resilvered 160G in 0h54m with 0 errors on Wed Mar 18 22:13:54 2015
config:

        NAME                                   STATE     READ WRITE CKSUM
        mir-300gb                              ONLINE       0     0     0
          mirror-0                             ONLINE       0     0     0
            scsi-SATA_Maxtor_7L300S0_L60BSESG  ONLINE       0     0     0
            scsi-SATA_Maxtor_7L300S0_L604H9XG  ONLINE       0     0     0

errors: No known data errors

linux   /ROOT/home-1@/boot/vmlinuz-3.2.0-4-amd64 root=ZFS=mir-300gb/ROOT/home-1 ro boot=zfs $bootfs   quiet

Oh, it was recommended to rename mir-300gb/ROOT/home-1 to mir-300gb/home, so that was done just before the export

Note to self: The issue is most likely with the fact that the root pool needs to be first for grub-mkconfig to work correctly.

this was the output of the first update-grub, when it was not finding the rpool. /home/rootfs had a backup of the boot drive and that was getting discovered:

Generating grub.cfg ...
Found linux image: /boot/vmlinuz-3.2.0-4-amd64
Found initrd image: /boot/initrd.img-3.2.0-4-amd64
Found memtest86 image: /ROOT/home-1@/boot/memtest86.bin
Found memtest86+ image: /ROOT/home-1@/boot/memtest86+.bin
Found memtest86+ multiboot image: /ROOT/home-1@/boot/memtest86+_multiboot.bin
done

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update-grub gets confused when other pools are created before rpool #20

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update-grub gets confused when other pools are created before rpool #20

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beren12 commented on Mar 20, 2015

beren12 commented on Mar 21, 2015

FransUrbo commented on Mar 21, 2015

beren12 commented on Mar 21, 2015

FransUrbo commented on Mar 21, 2015

beren12 commented on Mar 21, 2015

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