Running BE16 to backup a Hyper-V-Cluster starts with good performance, creates the avhdx (full backup) and after 20 minutes is down to 500 MB/sec. Cant cancel the job from the console, have to stop serrvices. Disk are connected over fibre-channel.
Searching for causes i found the HF and was thinking it should be included in FP1 which i installed already. Nevertheless i could install the HF over FP1 and it showed message HF successfully installed, that's a very strange behaviour.
Yes, BE16 Revision 1142 Hotfix 124683 is included in FP1.
The build of files in BE16 Revision 1142 Hotfix 124683 is 16.0.1142.1009.
The build of files in BE16 FP1 is 16.0.1142.1327.
So you can check the build of backup exec filess before and after apply Hotfix 124683 over FP1. I think the build of backup exec files will not be changed.