@rjt The November 2019 security, bugfix, and enhancement updates address this issue in the section "Enable increasing max_grant_frames for guests." Indicates that with not enough grant frames, the guest VM will not be able to use the all the virtual NICs that it expects. Still wonder if increasing max_grant_frames would speed up existing network interfaces even when they have enough working vNICS.

@andersonalipio Since something is up with the API, restarting the xapi toolstack on the host might help. Do not try migrating the running VM at first, but move to the shared NFS StorageRepository. Then after the VDI is hopefully successfully moved, then try moving the running VM. Does it move to the other Citrix XS 7 host?

During VM export, the ssh connection is gone and the result is frustrating. the disk of the virtual computer does not appear at all. Xcp-ng 8.0 use. I think he sent the disk to eternity.

The message was relatively clear (for a XAPI error This operation cannot be performed because the specified VDI could not be found on the storage substrate sr: 28a8b360-7b1b-58ca-81b6-f907c164ec38 (XCP-ng Tools) vdi: b1a7a49a-f17c-42ac-af73-4429eb57b07a (Old version of guest-tools.iso) This means the VM can't boot with this current CD because it's not there anymore. I suppose you updated your host without ejecting all CDs before. So the old tools CD was removed for the new one, and your VM kept it. So when you tried to boot, it couldn't because it couldn't find the old ISO.

Thanks Olivier. Yes I am able to set the parameter now using xe commands. Thanks for your help!

One socket right?

Just courios - what servcies do You still have on Server 2003?

@KFC-Netearth Welcome

Then I guess it's empty. I guess I'll just redo the server, and chalk this up as a one in a million file corruption, for which we didn't have the proper OS backup to counteract. We do have backups of the VMs anyway. Thanks for the help! We didn't get this fixed, but I did learn a lot! This is our first Xenserver/XCP host.

@olivierlambert That's true...

If you know exactly what's checked in the driver (CPU vendor, ACPI tables, BIOS info, SMI?), we might be able to dig into the right direction. It's just that I won't spend a lot of resources without knowing if our modifications are useful or not.

OK, thanks @fohdeesha that's really valuable information. Helps a lot. Peter.