[Bug 1540401] Re: ISST-LTE: Ubuntu14.04.4 lpar fails to boot after installation: "The disk drive for /boot is not ready yet or not present"

[Mathieu Trudel-Lapierre]

This isn't obvious to reproduce. So far, I haven't had the system fail
to boot or fail to mount all partitions. I have been testing *without*
multipath-tools 0.4.9-3ubuntu7.8; so not using multipathd in the
initramfs.

I suppose it may be that I'm using a partitioning that happens to work?

Could you please add the output of: sudo dmsetup ls --tree -o blkdevname

No failure after 20 reboots:

mpath0-part1 <dm-2> (252:2)
 └─mpath0 <dm-0> (252:0)
    ├─ <sdb> (8:16)
    └─ <sda> (8:0)
mpath1 <dm-1> (252:1)
 ├─ <sdd> (8:48)
 └─ <sdc> (8:32)
trusty-boot <dm-6> (252:6)
 └─mpath0-part2 <dm-3> (252:3)
    └─mpath0 <dm-0> (252:0)
       ├─ <sdb> (8:16)
       └─ <sda> (8:0)
trusty-swap <dm-5> (252:5)
 └─mpath0-part2 <dm-3> (252:3)
    └─mpath0 <dm-0> (252:0)
       ├─ <sdb> (8:16)
       └─ <sda> (8:0)
trusty-root <dm-4> (252:4)
 └─mpath0-part2 <dm-3> (252:3)
    └─mpath0 <dm-0> (252:0)
       ├─ <sdb> (8:16)
       └─ <sda> (8:0)

My test system is indeed a ppc64el qemu VM using spapr-vscsi.

Will setup a new system using snapshot to test with multipath-tools
0.4.9-3ubuntu7.8.

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Title:
  ISST-LTE: Ubuntu14.04.4 lpar fails to boot after installation: "The
  disk drive for /boot is not ready yet or not present"

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