i tried https://docs.xenserver.com/en-us/xenserver/8/dr/backup.html#back-up-single-host-installations but, "command not found".
At this time, the meta restore works perfectly. I got all my VMs back, but
since I don't believe in success, I didn't shut down the unavailable slave host, where the VMs was still running.
After restoring on a new master, all the VMs were also running.
except for IP conflicts, in that case I had double VDI usage!
The old server was shut down ASAP, but some VDIs were still corrupted anyway.
This wasn't a critical issue, but after EMERGENCY restoration, I expected that the host would be in emergency mode and the VMs would be halted.