Moving MSDB database When I am trying to move msdb database from it's default location (C:\Program Files\Microsoft SQL Server\MSSQL10.SQLEXPRESS\MSSQL\DATA) to another drive(E:). After moving the database I am getting error as shown below.(the error I am getting while expanding database node in SSMS and now I am not able to access any database.)


  Failed to retrieve data for this request.
  (Microsoft.SqlServer.Management.Sdk.Sfc)
  
  For help, click:
  http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&amp;LinkId=20476
  
  ------------------------------ ADDITIONAL INFORMATION:
  
  An exception occurred while executing a Transact-SQL statement or
  batch. (Microsoft.SqlServer.ConnectionInfo)
  
  
  
  Database 'msdb' cannot be opened due to inaccessible files or
  insufficient memory or disk space.  See the SQL Server errorlog for
  details. (Microsoft SQL Server, Error: 945)
  
  For help, click:
  http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&amp;ProdVer=10.00.2531&amp;EvtSrc=MSSQLServer&amp;EvtID=945&amp;LinkId=20476
  
  


The procedure I followed to shift msdb database is as follows:


For each file to be moved, run the following statement.



ALTER DATABASE msdb
 MODIFY FILE ( NAME = MSDBData , FILENAME = 'E:\MSDBData.mdf' )

ALTER DATABASE msdb
 MODIFY FILE ( NAME = MSDBLog , FILENAME = 'E:\MSDBLog.ldf' )


Stop the instance of SQL Server to perform maintenance.
Move the file or files to the new location.
Restart the instance of SQL Server or the server.
Also i did confirm the path by running following query


SELECT name, physical_name AS CurrentLocation, state_desc
     FROM sys.master_files
     WHERE database_id = DB_ID(N'msdb'); 

And output was showing current location of both MSDBdata and MSDBLog as E:\

This error happened while I did it for testing server. I want to do it for a production server. So please help me on this error. How exactly to move msdb database?
In the comments you indicate that your SQL Service is running as the Network Service account. 

http://msdn.microsoft.com/en-us/library/windows/desktop/ms684272(v=vs.85).aspx


  The NetworkService account is a predefined local account used by the
  service control manager. This account is not recognized by the
  security subsystem, so you cannot specify its name in a call to the
  LookupAccountName function. It has minimum privileges on the local
  computer and acts as the computer on the network.


This is the default account for installations under Vista and Windows Server 2008. During installation this account was granted Full Control file system permissions to the SQL Server data directory as seen in the File System Permissions Granted to SQL Server Per-service SIDs or Local Windows Groups section of the following article.

http://msdn.microsoft.com/en-us/library/ms143504.aspx#Reviewing_ACLs

Since you have relocated some of your database file the SQL Server service account needs permissions to the new locations. In the comments @Marian provided instructions for granting Network Service the required permissions.


  Right click the drive -> Properties -> Security -> Edit -> add the
  Network Service user -> give him full control. By default he hasn't.
  Or better, just create a specific folder and give him Full Control
  permissions there. And move the data files in that folder.


The advice to create a new folder and move the files there is excellent as well.

Any additional services that are running as the Network Service account will aslo have permissions to this folder. Ideally the SQL Services should each have their own separate account.

http://support.microsoft.com/kb/2160720


  When choosing service accounts, consider the principle of least
  privilege. The service account should have exactly the privileges that
  it needs to do its job and no more privileges. You also need to
  consider account isolation; the service accounts should not only be
  different from one another, they should not be used by any other
  service on the same server. Do not grant additional permissions to the
  SQL Server service account or the service groups. Permissions will be
  granted through group membership or granted directly to a service SID,
  where a service SID is supported. For more details please refer to
  Books Online Topic Setting Up Windows Service Accounts