AWS VTL Tape drive issue

Hello techies,

Need to help to fix the below issue.

Environment:

NetBackup appliance 5230 : 7.6.0.3

Media server: Windows 2008 Enterprise server (VM server)

In my set-up i have 10 AWS glacier VTL tape drives connected to my Media server. A Gateway server is lying in the middle of Media server and AWS.

My problem is most of the time the tape drives are not getting detected from OS end. while checking the eventlog i can the error "Operator/EMM server has Down'ed drive".

When i re-start the media server the drives are getting detected. I suspected the issue on server load and increased CPU & RAM..Still issue persists.

Please advise me on it.