Full backup restore error: Stream_vdi.Invalid_checksum

splastunov

@RS Few years ago I faced the same errors on all xva backups and after that switch to vdi backups.
I did not find the root of problem, but I know how to "repair" broken backup.

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:

Create VM or get server with modern Ubuntu. You will need x3 space of your backup size.
Copy broken backup
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

Unpack backup

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

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

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

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

RS

@splastunov said in Full backup restore error: Stream_vdi.Invalid_checksum:

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.

splastunov

@RS sorry, I have no idea how to fix it

RS

@Danp I try diferent SMB repository, but with same result.

Danp

@RS Are you able to replicate this problem using XOA?

RS

@Danp said in Full backup restore error: Stream_vdi.Invalid_checksum:

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.

Danp

@RS Deploy an instance of XOA and start a trial. Then use this to test if you can replicate this issue. This will help determine if it is an issue with your build environment or a larger issue affecting XOA.

RS

@Danp I try XOA in trial mode and backup/restore works, so problem is probably in our build

olivierlambert

@RS There's no source "versions", just latest commit must be used. Please see https://xen-orchestra.com/docs/community.html#report-a-bug

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.

RS

@olivierlambert I test XOA - works. I try build from source - Ubuntu 22.04.4 - not work, Ubuntu 24.04 - not work, Rocky linux v9.4 - works.
So problem is only on Ubuntu, I can re-install Xo server to new server and stay on Rocky Linux v9

olivierlambert

Yes, you can always export/import the config on a working install. So it's a problem on your build, it's really hard to tell where's the culprit (because you built it, you see why we distribute it via XOA for production/professional usage )