La remarque a été intégrée dans l'article: https://www.myprivatelab.tech/xcp_lab_v2_ha#perte-master Merci encore pour le retour.

I've seen this happen after a BIOS update or if a CMOS battery starts failing. Sometimes the motherboard resets to 'Legacy' instead of 'UEFI' (or vice versa), and GRUB just loses its mind because it can't find the partition it expects. It’s worth a quick check in your firmware settings to make sure the boot mode and the drive order haven't shifted on you.

@bvitnik good catch, that form had multiple issues, I just fixed all of them - https://github.com/benapetr/XenAdminQt/commit/4847e85f2403f3c6fd328f17754c91df21c36502 this was one of them 0 benapetr committed to benapetr/XenAdminQt refactor of new SR wizard fixed missing NFS version selector made Test Connection button appear only when we create new SR, not ISO, because xapi doesn't support probe on ISO objects implemented drop-in descriptions when nothing is provided cleaned up some qvariant scraping and invalid creation of XenLib objects (like Host) instead we retrieve them from the cache now

Support tunnel is active but I have troubles to access support "Oops, something went wrong! Don't worry, our team is already on it". I'll keep trying, thanks.