Hello, I tried to replicate this problem on an amd64 VM with 4 SCSI multipath devices. That said I was able to:
* Install the OS on mpatha, complete the installation, come back to installer * Install the OS on mpathb, complete the installation, come back to installer * Install the OS on mpathc, complete the installation, come back to installer * Install the OS on mpathd, complete the installation, come back to installer All 4 OSes have been installed using the ubuntu-25.10-live-server- amd64.iso installer. Logs down below. I suppose there is a timing aspect that is different when using HBAs & LUNs. mpatha (0QEMU_QEMU_HARDDISK_MPIO0) dm-0 QEMU,QEMU HARDDISK size=12G features='0' hwhandler='0' wp=rw |-+- policy='service-time 0' prio=1 status=active | `- 0:0:0:0 sda 8:0 active ready running `-+- policy='service-time 0' prio=1 status=enabled `- 0:0:1:0 sdb 8:16 active ready running mpathb (0QEMU_QEMU_HARDDISK_MPIO1) dm-1 QEMU,QEMU HARDDISK size=12G features='0' hwhandler='0' wp=rw |-+- policy='service-time 0' prio=1 status=active | `- 0:0:3:0 sdd 8:48 active ready running `-+- policy='service-time 0' prio=1 status=enabled `- 0:0:2:0 sdc 8:32 active ready running mpathc (0QEMU_QEMU_HARDDISK_MPIO2) dm-2 QEMU,QEMU HARDDISK size=12G features='0' hwhandler='0' wp=rw |-+- policy='service-time 0' prio=1 status=active | `- 0:0:5:0 sdf 8:80 active ready running `-+- policy='service-time 0' prio=1 status=enabled `- 0:0:4:0 sde 8:64 active ready running mpathd (0QEMU_QEMU_HARDDISK_MPIO3) dm-3 QEMU,QEMU HARDDISK size=12G features='0' hwhandler='0' wp=rw |-+- policy='service-time 0' prio=1 status=active | `- 0:0:6:0 sdg 8:96 active ready running `-+- policy='service-time 0' prio=1 status=enabled `- 0:0:7:0 sdh 8:112 active ready running Jan 16 13:52:32 ubuntu-server multipathd[1718]: multipathd v0.11.1: start up Jan 16 13:52:32 ubuntu-server multipathd[1718]: reconfigure: setting up paths and maps Jan 16 13:52:32 ubuntu-server multipathd[1718]: _check_bindings_file: failed to read header from /etc/multipath/bindings Jan 16 13:52:32 ubuntu-server multipathd[1718]: updated bindings file /etc/multipath/bindings Jan 16 13:52:32 ubuntu-server multipathd[1718]: updated bindings file /etc/multipath/bindings Jan 16 13:52:32 ubuntu-server multipathd[1718]: sda: setting scsi timeouts is unsupported for protocol scsi:unspec Jan 16 13:52:32 ubuntu-server multipathd[1718]: sdb: setting scsi timeouts is unsupported for protocol scsi:unspec Jan 16 13:52:32 ubuntu-server multipathd[1718]: 0QEMU_QEMU_HARDDISK_MPIO0: rename 0QEMU_QEMU_HARDDISK_MPIO0 to mpatha Jan 16 13:52:32 ubuntu-server multipathd[1718]: updated bindings file /etc/multipath/bindings Jan 16 13:52:32 ubuntu-server multipathd[1718]: sdc: setting scsi timeouts is unsupported for protocol scsi:unspec Jan 16 13:52:32 ubuntu-server multipathd[1718]: sdd: setting scsi timeouts is unsupported for protocol scsi:unspec Jan 16 13:52:32 ubuntu-server multipathd[1718]: 0QEMU_QEMU_HARDDISK_MPIO1: rename 0QEMU_QEMU_HARDDISK_MPIO1 to mpathb Jan 16 13:52:32 ubuntu-server multipathd[1718]: updated bindings file /etc/multipath/bindings Jan 16 13:52:32 ubuntu-server multipathd[1718]: sde: setting scsi timeouts is unsupported for protocol scsi:unspec Jan 16 13:52:32 ubuntu-server multipathd[1718]: sdf: setting scsi timeouts is unsupported for protocol scsi:unspec Jan 16 13:52:32 ubuntu-server multipathd[1718]: 0QEMU_QEMU_HARDDISK_MPIO2: rename 0QEMU_QEMU_HARDDISK_MPIO2 to mpathc Jan 16 13:52:32 ubuntu-server multipathd[1718]: updated bindings file /etc/multipath/bindings Jan 16 13:52:32 ubuntu-server multipathd[1718]: sdg: setting scsi timeouts is unsupported for protocol scsi:unspec Jan 16 13:52:32 ubuntu-server multipathd[1718]: sdh: setting scsi timeouts is unsupported for protocol scsi:unspec Jan 16 13:52:32 ubuntu-server multipathd[1718]: 0QEMU_QEMU_HARDDISK_MPIO3: rename 0QEMU_QEMU_HARDDISK_MPIO3 to mpathd -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. 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! To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/2133480/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
