Comment # 11 on bug 1230345 from Thomas Blume

(In reply to Nikolay Gueorguiev from comment #10)

>         default:
>                 if (info->partnum) {
>                         error_reason("Unsupported SCSI disk layout");
>                         return -1;

Hm, that looks like zipl fails if it detects the disk layout on a partition
instead of a disk device.

Usually, I can see the multipath disk device as /dev/dm-0 on my testmachines
and subsequent dm-X numbers as the partitions on this device.
e.g. my strace shows:

-->
[pid 68581] newfstatat(AT_FDCWD, "/dev/dm-0", {st_mode=S_IFBLK|0660,
st_rdev=makedev(0xfe, 0), ...}, 0) = 0
--<

In the failing multipath zipl setup strace, I cannot find any dm-0, but dm-1
instead:

-->
3480829 newfstatat(AT_FDCWD, "/dev/dm-1", {st_mode=S_IFBLK|0660,
st_rdev=makedev(0xfe, 0x1), ...}, 0) = 0
--<

However, if you have more than one multipath device attached, dm-1 could be
valid for a disk device, so not sure if my suspect holds.