If you want to test, deploy an XOA and see if it works better, that might help to rule out a build issue or the fact you are not on the last commit.

Are you able to replicate this problem using XOA

I dont use XOA, I only try re-create new installation on new VM but with same result too.

vhd-util check -n

I try all backups, and all backups looks corrupted. I dont have problem re-create all backups again, but now is main problem I cannot use XO for backup because every next backup is bad. About some month ago, all works.

Check xva backup with command vhd-util check -n name_of_backup.xva.
If you got something like Checksum : 0x0|0xffffffff (Bad!), the solution is:

1. Create VM or get server with modern Ubuntu. You will need x3 space of your backup size.
2. Copy broken backup
3. Install xva-img https://github.com/eriklax/xva-img

apt-get install libssl-dev g++ cmake
add-apt-repository ppa:ubuntu-toolchain-r/test && apt-get update && apt-get install -y gcc-7

#To compile execute following commands in xva-img folder

cmake ./
make install

4. Unpack backup

mkdir my-virtual-machine
tar -xf name_of_backup.xva.xva -C my-virtual-machine
chmod -R 755 my-virtual-machine

5. Create RAW disk. Replace Ref\:1 with your digits

xva-img -p disk-export my-virtual-machine/Ref\:1/ disk.raw

6. Install qemu-utils from standard repos apt install qemu-utils
7. Convert RAW to VHD qemu-img convert -f raw -O vpc disk.raw resotred.vhd
8. Copy VHD to xcp-ng SR cp resotred.vhd /run/sr-mount/{sr-uuid}/
9. Get UUID of your restored VHD. This command should be executed on xcp-ng server. vhd-util read -p -n resotred.vhd
10. Rename vhd
11. Rescan SR, rename VHD with empty name

I try maually import xva with same error:
The VM could not be imported.
msg: INTERNAL_ERROR: [ Stream_vdi.Invalid_checksum("Block Ref:73/00000711 checksum failed: original = 004F1F9D976463DF; recomputed = 28C8B00D9CB64DCE") ]

Did you attempt to import the XVA from the CLI as suggested below?

@olivierlambert said in Restoring Full Backup Error: Stream_vdi.Invalid_checksum:

What could be interesting: importing the XVA with xe CLI and see if the result is the same.