Windows Server 2019 VM Won't Boot after Migration from LVM to ZFS

[rflaherty]

I have attempted a direct dd over ssh migration of a particular VM which is an an older Proxmox 5.4-5 server to a new server running 6.1-7 three different times now, and I end up having the same issue everytime. This is the command that I used to do the migration (worked fine for my other VMs), but when I attempt to boot, I get the windows logo loading for a bit, before the VM simply shuts down with no warning.


d if=/dev/mapper/pve-vm--104--disk--0| pv -s 966G | ssh root@10.9.9.10 dd of=/dev/zvol/rpool/data/vm-105-disk-0


I attempted a checkdisk on it from a boot cd, and now I simply get a "no bootable device found" error. I have also made the configurations of both VMs identical.

 

[Stoiko Ivanov]

On a hunch - does it work if you set a blocksize to both dd commands (should also speed up the transfer):
add `bs=64M` to both dd invocations.

 

[rflaherty]

On a hunch - does it work if you set a blocksize to both dd commands (should also speed up the transfer):
add `bs=64M` to both dd invocations.

Very possible, I would have to wait until next weekend to try it since it takes about 15 hours to transfer. My only hesitation to point to that as the issue is that I did an identical migration from and to the same Proxmox servers, with the exact same settings and had no issues.