I'm using wbadmin on six Windows Server 2008 R2 Std file servers; the data goes to a USB drive attached to each server. At the start of the first scheduled backup after a file server is restarted for any reason (such as WSUS last night) the status of the wbadmin job shows "preparing media to store backups" and moves no data for about 30-35 minutes. The USB drive being used has not been switched out.
All six of my file servers using wbadmin do this, every time they are restarted. They do not show this behavior at any other time.
I'm not as concerned about this occurring on these file servers as I am about the possiblity that this long delay may be causing or contiobuting to some problems I'm having with DPM and Hyper-V vms on a cluster. Which log would show this, if any, since it is a status, not an error event with an ID?