原来NBU MASTER安装在C盘了，导致C盘空间剩余很少，在官网找了一个解决方案如下：
- before any operation, of course backup your catalog and you C: drive
- stop netbackup
- Create if not exist the directory “D:\Netbackup”.
- Copy C:\Veritas\Netbackup\db to D:\Netbackup\db
- Rename C:\Veritas\Netbackup\db to C:\Veritas\Netbackup\db.old
- Run regedit.exe and create in “HKEY_LOCAL_MACHINE\SOFTWARE\Veritas\Netbackup\Currentversion\Paths” a REG_SZ key “DATABASE_PATH” with the value “E:\\Netbackup\\db” {double the “\“ sign in the value}
-restart netbackup
