I am setting up a new instance using maintenance plans and mirrors.
The full and differential jobs run without issue but when the transaction log backup job runs I get the above error and the job fails.
When I check the filesystem, the local copy is written but the mirror copy is not. This only happens for the transaction log backup not the full or dif that are writing to the same location.
I am running Litespeed 8.5, sql server 2012 SP3 CU9.
Has anyone else run into this?