I have a virtual system that recently started requiring manual intervention to complete boot. It is a qemu-kvm virtual machine with an iSCSI pseudo-disk formatted as an LVM physical volume. The PV contains a single volume group with 8 logical volumes, named for their mount points on /:
LV Name boot LV Name swap LV Name tmp LV Name root LV Name usr LV Name var LV Name home LV Name pub Boot faults to an (initrd) prompt with a complaint that the /usr LV, correctly identified by its UUID, does not exist. It does, but is not activated. In fact, lvscan shows that only the root and swap LVs are active, and the others are not. Issuing the "vgchange -ay" command at the initrd prompt activates the remaining LVs, and after exiting initrd shell startup continues normally without further boot related issues. I don't know of any system change might have affected booting. The VM is used as a plex server and updated regularly using unattended upgrades, but none of the updates since the last good boot stood out as a possible culprit. Rebuilding the initrd and reinstalling grub did not correct the problem. Neither the host nor the guest VM is rebooted often, and it is not a particularly serious problem now that it's known, but it would be better gone. I'm not averse to doing work to sort this out, but would be grateful for pointers to relevant documentation or other information, or suggestions for fixing it. and wouldn't object to information about fixing it, if anyone has encountered it previously. Thanks Tom Dial
