Citrix XenServer Error: SR_BACKEND_FAILURE_65

I’ve been having issues attaching a VDI to a VM from a NetApp snapshot.  Basically a storage level snapshot that happen while the server was live.  I keep getting the error “The attempt to load the VDI failed” via XenCenter when I try and boot the VM.  I would then look at the log file: /var/log/xensource.log.  I would see that the VM was tossing out the error “SR_BACKEND_FAILURE_65” when it tried to boot.

I have been unable to get the VDI to load on any server.  I even contacted Citrix looking for help and they were unable to get the VDI to load as well.  I’ve seen several others on the internet run into this issue without a resolution.   If someone knows of a trick to get these VDIs to load, please leave a comment!

Hope this helps!

Citrix XenServer Error: The SR failed to complete the operation

Yesterday we started to run out of space on one of our storage repositories.  When we tried to move any VDI on that SR via XenCenter, we got the error “The SR failed to complete the operation”.  Which is a pretty generic error, par for xenserver errors.  I even got the same error when trying to do a ‘Rescan’.

I continued to troubleshoot, looking through logs and command outputs.  I finally found something to look into.

Ran the command:
xe sr-param-list uuid=eb943814-a329-5f84-bd42-af1858d56632

Noticed this parameter:
other-config (MRW): dirty: ; auto-scan: false

I looked into this “dirty” param…  It means xenserver isn’t happen with the file names on the SR.   I listed the files on my SR and saw that someone created a manual copy of a VDI called: Copy of f897ebcf-9365-471b-8a30-e81f564c2536.vhd.

I fixed it by:

* Removing file: Copy of f897ebcf-9365-471b-8a30-e81f564c2536.vhd
* Rescanning the SR
* I was then able to move the VDI from one SR to another with out error.

 

Hope this helps with your day:

Citrix XenServer 6.5 Performance Comparison

Noticed this on the Citrix blog today. A nice little performance comparison between ESXi 5.5 and XenServer 6.5. Citrix claims to show a 11-16% performance advantage over VMware.  I’m holding off on upgrading to 6.5 till summer, but can’t wait to run some of my own benchmarks against XenServer 6.2.