QA

The system has degraded hardware raid with alarm tone. onboard raid controller showing multiple red leds, likely for that reason. Still system boots up and should be reachable over ssh. I set "ipmitool lan set ipsrc dhcp" and set IPMI user/password to ADMIN/ADMIN, system root password hacky one. I put in a replacement HDD and the hardware RAID controller is currently rebuilding the RAID. Status should be checked at a later time over IPMI SoL. If nothing useful shows up just reboot and check the output on SoL.

I connected physical screen and keyboard although IPMI SoL would likely have sufficed. The physical connection for screen and keyboard is just a bit more reliable. drives 0+1, 2+3, 6+7 are fine and now in sync. 5 was still showing as missing. I rescanned all devices and that found 5 again but degraded. Then I did "Initialize Drives" and re-initialized drive. Now it's rebuilding again. This will again take some hours. To be checked later.

EDIT: Ended up eventually as "degraded" again. nicksinger and me then removed the complete RAID and installed a plain Leap 15.5 on a RAID1 formed by sda+sdb. The system failed to boot up properly. I booted again an interactive installer, logged in over ssh and chrooted into the root partition and did grub2-install /dev/md0p4 but that showed

grub2-install: warning: btrfs zstd compression is disabled, please change install device to disk.
grub2-install: error: ../grub-core/disk/diskfilter.c:1038:diskfilter writes are not supported.

I don't think that worked as intended. I guess we should try the installation again. But everything relevant is remotely accessible.

I switched the machine off over IPMI and confirmed that the policy is "always-off" so that no power is wasted. We need to focus on more closely migration related tasks now.

https://racktables.nue.suse.com/index.php?page=object&tab=default&object_id=9208 marked as "unused", entry is correct