Thx Nick. There is not much I can find when stranded in busybox:
ls -l /sys/block/dm-*
ls: /sys/block/dm-*: No such file or directory
cd /sys/block
ls
loop3 loop5 loop7 loop0 loop2 loop4 loop6 loop1
Also running:
udevadm control --reload && udevadm trigger
doesn't change the situation, not in /sys/block, nor in /dev/disk.
I've noticed quite some changes in the systemd version of plucky (changelog),
but also that there is an updated version in -proposed - that I should probably
give a try.
On top there are several differences between 55-dm.rules and
60-persistent-storage-dm.rules between 24.04.2 and 25.04 (I should still
compare with newer 24.10 instead of 24.04.2).
And the rules are there (in initramfs):
ls
50-firmware.rules 64-btrfs.rules
50-udev-default.rules 64-md-raid-assembly.rules
55-dm.rules 69-bcache.rules
55-scsi-sg3_id.rules 69-lvm.rules
56-lvm.rules 71-seat.rules
58-scsi-sg3_symlink.rules 73-special-net-names.rules
60-block.rules 75-net-description.rules
60-persistent-storage-dm.rules 80-drivers.rules
60-persistent-storage.rules 80-net-setup-link.rules
61-persistent-storage-android.rules 81-dpm.rules
63-md-raid-arrays.rules 95-dm-notify.rules
64-btrfs-dm.rules s1lp15vg-s1lp15lv.rules
(initramfs) [6n
Incl. this one from the installation (curtin):
cat s1lp15vg-s1lp15lv.rules
# Written by curtin
SUBSYSTEM=="block", ACTION=="add|change", ENV{DM_NAME}=="s1lp15vg-s1lp15lv",
SYMLINK+="disk/by-dname/s1lp15vg-s1lp15lv"
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https://bugs.launchpad.net/bugs/2102236
Title:
plucky/s390x (with root disk on dm?) does not come up after kernel
update + reboot
Status in Ubuntu on IBM z Systems:
New
Status in linux package in Ubuntu:
New
Status in lvm2 package in Ubuntu:
New
Bug description:
While using the plucky daily from March 12 (that still comes with kernel 6.12)
(and working around LP#2101831, by forcing the installation to not apply any
updates)
I get a system installed, which is at kernel level 6.12.
Since 6.14 is out (in plucky release) since yesterday (March 12th) I tried to
upgrade from 6.12 to 6.14,
and the update itself seemed to be smooth (I couldn't find any errors while
doing a full-upgrade in the terminal - see attached logs).
But after executing a reboot, the system (in 3 different
configurations, that use dm) does not come up again, and ends up in
busybox, complaining that the root device couldn't be found:
# s1lp15 FCP/SCSI multipath with LVM
ALERT!
/dev/disk/by-id/dm-uuid-LVM-SlleSC5YA825VOM3t0KHBVFrLJcNWsnwZsObNziIB9Bk2mSVphnuTEOQ2eFiBbE1
does not exist. Dropping to a shell!
# s1lp15 2DASDs with LVM:
ALERT!
/dev/disk/by-id/dm-uuid-LVM-ePTbsojYPfgMacKXwpIMNMvxk80qGzlPhRYw7DJlovmqHyla9TK6NGc70p1JN29b
does not exist. Dropping to a shell!
# s1lp15 FCP/SCSI Multipath no LVM
ALERT! /dev/disk/by-id/dm-uuid-part1-mpath-36005076306ffd6b60000000000002603
does not exist. Dropping to a shell!
However, using a single disk without dm (so: no multipath, no lvm) the
system is able to come up again after the reboot (after a kernel
upgrade).
# s1lp15 single DASD no LVM
here the root device is:
root=/dev/disk/by-path/ccw-0.0.260b-part1
and it exists.
In the 3 different cases that (that repeatedly fail) "/dev/disk/by-id"
is missing.
I am not sure yet what's causing this,
it can be an issue with the device-mapper/lvm2
but also udev rules or kernel.
So maybe I need to add the kernel as affected component too (for now).
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu-z-systems/+bug/2102236/+subscriptions
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