------- Comment From [email protected] 2015-02-26 16:51 EDT-------
Hi Brian,

As you observed, grub.cfg has "root=UUID=e3142d5d-f8f1-4278-a08a-
6bda31d2dc79" as it's default entry, and has alternate entries for
/dev/sda, sde, sdq and sdu also.  None of these drives is in a multipath
group.

Is the expectation here that these should belong to a multipath group,
and the system should be booted from the multipath device?  Should this
UUID be pointing to a multipath device instead of a single path?  Could
this have been an install problem?

Given that the UUID points to a single path device, it does look correct
as it's booted currently:

root@zop01:~# cat /proc/cmdline
BOOT_IMAGE=/boot/vmlinux-3.18.0-13-generic 
root=UUID=e3142d5d-f8f1-4278-a08a-6bda31d2dc79 ro splash quiet

root@zop01:~# ll /dev/disk/by-uuid/*c79
lrwxrwxrwx 1 root root 10 Feb 18 07:11 
/dev/disk/by-uuid/e3142d5d-f8f1-4278-a08a-6bda31d2dc79 -> ../../sdu2

root@zop01:~# mount
/dev/sdq2 on / type ext4 (rw,errors=remount-ro)

Second, on the /etc/fstab:

root@zop01:~# cat /etc/fstab
# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point>   <type>  <options>       <dump>  <pass>
/dev/mapper/mpath0p2 /               ext4    errors=remount-ro 0       1
/dev/mapper/mpath0p3 none            swap    sw              0       0
...

Again we see this naming inconsistency,  Currently, this system has only
the /dev/mapper/mpathX-partX names, none of the /dev/mapper/mpathXpX
names.

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https://bugs.launchpad.net/bugs/1425773

Title:
  multipath command not showing boot disk information

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