I post just to share an issue i was confronted since I've upgraded to the V7.
Some of my backup job failed with the error below :
"Unable to perform offhost backup for *HOST NAME* because storage rescan did not complete for this host yet.
Task failed Error: The specified file is not foun. Error code: 2 Failed to open file [C:\ClusterStorage\Volume6\*VM Name*\*VHD file name*] in readonly mode."
I've resolved this issues by renaming the vhd files which contained accented characters and then rerun the failed job.
Be careful with accented characters