hi
VSS_E_PROVIDER_VETO is a generic error and you need to investigate more on the possile cause.
This means check the application event logs and the snapdrive logs at least...
- did you create the new lun using Snapdrive? If not please be sure that the list containst all the requested partitions (Primary partition and the MSR partition)
you can use diskpart to check that https://technet.microsoft.com/en-us/library/cc766465(v=ws.10).aspx
- Disable the AntiVirus engine just to avoid that it is running and maybe put a VETO during the backup procedure
- When a VSS framework is involved in a backup procedure all the vss components needs to be in a clean status otherwise the backup will fail.
for that please check the output of the command "vssadmin list writers"
- Please check the Snapdrive logs and the MS event logs at the same time of the VSS error to see if you have some more information on the error.
Try also to run a backup without including the "affected" lun
if that won't help i think the next step is to enable an collect a VSS trace...