How to backup DPM database

Question

How to backup DPM database for restore DPM server (2012 R2).
I try: http://technet.microsoft.com/en-us/library/hh758162.aspx
To back up the DPM database
On the computer where your DPM database is located, do one of the following:
If the DPM database is on the DPM server                
On the DPM server, open an elevated command prompt window, go to cd <system drive>:\Program Files\Microsoft DPM\DPM\bin, and run
DPMBackup.exe -db
and this not working:
C:\Program Files\Microsoft System Center 2012 R2\DPM\DPM\bin>DpmBackup.exe -db
DpmBackup 1.0 - Data Protection Manager backup command-line tool
Copyright (c) 2013 Microsoft Corporation. All rights reserved.
Error: Invalid command -db.
Description:
         DpmBackup backs up the DPM database, and creates shadow copies that can
be used for backing up replicas.
         To back up the DPM database, run DpmBackup.exe -db locally on the compu
ter running DPM.
Usage:
         DpmBackup.exe [-db [-sqlServerName <name>] [-instanceName <name>] [-dpm
dbName <name>] [-targetLocation <location>]] [-replicas] [-certificates]
... deleted
where is problem ?

Answer 1

 Add "instanceName" and "dpmdbname" parameters, like this: DpmBackup.exe -db -instanceName "<SQLInstanceName>" -dpmdbname <DPMDB_NAME>
Use "(Local)" as <SQLInstanceName> if you use default SQL instance (MSSQLSERVER). Also, please make sure that account, under which SQL server runs, have permissions to write into %DPMInstallLocation%\Volumes\ShadowCopy\Database Backups\ folder.
http://kf.lj.ru