(please ignore comment #1, that was an accident)
Based on this bug I tried to recreate the case again, but still on a different
platform.
So I setup a system with 2 SCSI LUNs attached via multipath,
and I was able to complete an installation of Ubuntu 25.10.
Here is how it looks like:
ubuntu@special06:~$ sudo multipath -ll
[sudo: authenticate] Password:
mpatha (3600507630bffd3d70000000000000005) dm-0 IBM,2107900
size=96G features='1 queue_if_no_path' hwhandler='1 alua' wp=rw
`-+- policy='service-time 0' prio=50 status=active
|- 0:0:0:1074085888 sda 8:0 active ready running
|- 0:0:1:1074085888 sdb 8:16 active ready running
|- 1:0:0:1074085888 sdc 8:32 active ready running
`- 1:0:1:1074085888 sdd 8:48 active ready running
mpathb (3600507630bffd3d70000000000000107) dm-4 IBM,2107900
size=96G features='1 queue_if_no_path' hwhandler='1 alua' wp=rw
`-+- policy='service-time 0' prio=50 status=active
|- 3:0:0:1074216961 sdg 8:96 active ready running
|- 3:0:1:1074216961 sdh 8:112 active ready running
|- 2:0:0:1074216961 sde 8:64 active ready running
`- 2:0:1:1074216961 sdf 8:80 active ready running
ubuntu@special06:~$ sudo dmsetup ls --tree
mpatha-part1 (252:1)
└─mpatha (252:0)
├─ (8:48)
├─ (8:32)
├─ (8:16)
└─ (8:0)
mpathb (252:4)
├─ (8:80)
├─ (8:64)
├─ (8:112)
└─ (8:96)
ubuntu--vg-ubuntu--lv (252:3)
└─mpatha-part2 (252:2)
└─mpatha (252:0)
├─ (8:48)
├─ (8:32)
├─ (8:16)
└─ (8:0)
Maybe your multipath setup is a bit different (I have 4 HBAs, two per
LUN, you may have just 2 HBAs that server both of your two LUNs), and
you may have installed the OS across your two LUNS ? (I Haven, for two
LUNs are attached to the system, but the install was only on a single
one).
So could you please share more details about your multipath setup and
disk layout (to be able to recreate more exactyl on my side?)
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https://bugs.launchpad.net/bugs/2133480
Title:
Ubuntu25.10: Ubuntu host installation is failing while doing
installation on multiple[2 or more] multipath SAN disks!
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