GRT backup for Sharepoint not writing data

Hello Experts,

Need assistance on below issue,

NBU Master : Linux Version : 7.0.1

NBU Client : Windows Version : 7.0.1 Shrapoint : Microsoft Sharepoint 2010

Sharepoint backup running fine for this server.

But Sharepoint GRT backup is showing "Active and Writing" but not showing any "Kilobytes" written since long.

Unable to find the cause of this.

Please provide your assistance.