grub-reboot

Hi, A node(Proxmox 01) in my cluster after I have to enlarge root LVM, is no longer booted. Unfortunately, I do not have a backup of root system In normal other node of proxmox looks like this: root@prox03:~# blkid |grep root /dev/mapper/pve-root...

i need to remotely change the operating system at startup, I have a problem activating grub-reboot I have a test machine with an old pve 4.4 (but I have also tried with the next version) in dualboot with windows 7 I configure everything (https://wiki.debian.org/GrubReboot) on reboot the item is...