I asked the kernel team already to have a look at this as well, when I marked it as affecting 'linux (Ubuntu)', it's suspicious.
And no, the disk nodes are missing in /dev. It's a multipath environment with two HBAs, each two paths, so there need to be four SCSI devices (sda, sdb, sdc and sdd), but there are none (being in busybox): ls -la /dev/sd* ls: /dev/sd*: No such file or directory ls -la /sys/block lrwxrwxrwx 1 0 loop3 -> ../devices/virtual/block/loop3 lrwxrwxrwx 1 0 loop5 -> ../devices/virtual/block/loop5 lrwxrwxrwx 1 0 loop7 -> ../devices/virtual/block/loop7 lrwxrwxrwx 1 0 loop0 -> ../devices/virtual/block/loop0 lrwxrwxrwx 1 0 loop2 -> ../devices/virtual/block/loop2 lrwxrwxrwx 1 0 loop4 -> ../devices/virtual/block/loop4 lrwxrwxrwx 1 0 loop6 -> ../devices/virtual/block/loop6 lrwxrwxrwx 1 0 loop1 -> ../devices/virtual/block/loop1 dr-xr-xr-x 12 0 .. drwxr-xr-x 2 0 . -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2102236 Title: plucky/s390x (with root disk on dm?) does not come up after kernel update + reboot To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-z-systems/+bug/2102236/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
