6 Replies Latest reply: Apr 22, 2012 4:53 AM by Carlos Rojas RSS

Netwoker User cannot see all savesets during recover, but Networker Server shows complete Index and Savesets

hwilfing

NW-server is 7.6.3.Build.840 Power Edition (on SLES10 SP4); affected Client is MS Cluster with Win 2003 R2 sp2 with NW 7.6.3.0.Build.840.

Until a certain point in time the backup of this cluster went fine, meanwhile it failed with errors:

 

"VSS failed to take the snapshot.

VSS Provider or hardware error. The provider logged the error in the event log.

Snapshot attempt number 2 of 3 will occur in 10 minutes.

VSS snapshot failed with error 0x80042301 -- VSS Backup or Restore is not in the correct state for the operation, or the writer is not in the correct state..

Networker will save the files without the snapshot.

File index error: permission denied, `SYSTEM' on `cluster-node-1-FQDN' must have remote access privilege to client 'cluster-name-FQDN."

 

for certain save sets, backup of the remaining save sets succeeded after 1 retry.

 

We resolved this by re-installing the NetWorker client with a current version (7.6.3.0). All next Full and Incremental backups went fine again, but when issuing a recover (using NetWorker User) only some (first 2 of 5 - then after some days 3 of 5 drives) of all backed up save sets are visible/accessible for restores. We've already tried to use several different Windows clients to do directed recovers but everytime we end with the limited 'view' of save sets.

 

Thanks in advance for your support!

Best regards,

Herbert

  • 1. Re: Netwoker User cannot see all savesets during recover, but Networker Server shows complete Index and Savesets
    Carlos Rojas

    Hi Herbert,

     

    This could happen for different reasons.

     

    I would suggest you first to check the /nsr/tmp/sg/group_name/ folder, as there is one file created per saveset, and there you will find further information.

     

    On the other hand, you should check the output en of the following commands, or even attach it here please:

     

    vssadmin list writers

     

    vssadmin list providers

     

    Please, set the inactivity timeout in the group properties to "0", and also the client retries, so NetWorker won't request more than once a VSS operation (shadow creation).

     

    Also ensure that in the clients related to that cluster (physical and virtual nodes) you have, in the remote access:

     

    *@node1.domain.com

    *@node2.domain.com

    *@nodev.domain.com

     

    Or you can add instead:

     

    *@*

     

    This is less secure, but will help to troubleshoot this issue if it's permissions related.

     

    Also ensure that name resolution forward and reverse works fine for clients and server.

     

    Thank you.

    Carlos

  • 3. Re: Netwoker User cannot see all savesets during recover, but Networker Server shows complete Index and Savesets
    hwilfing

    Hi Carlos,

    thanks for your quick reply.

     

    The mentioned VSS issues are gone since re-installation of the NetWorker Client.

    Also the backup succeeds without problems (e.g. the backup completion notes for the regarding group stating everything OK, index of the regarding client is complete, even querying media db (via mminfo) shows all save sets with their location on which tape,...).

     

    So the actual problem is just the missing savesets during recovery.

    All related backup clients (2 physical nodes) are added in the remote access field as follows:

    node1.domain.com

    node2.domain.com

    If needed, I can of course add "*@" in front of both lines but I guess this is no problem because generally a directed recover is possible (at least for these drives which are browseable during the recover attempt).

    Name resolution should be fine as well but will double-check.

     

    Thank you.

    Herbert

  • 4. Re: Netwoker User cannot see all savesets during recover, but Networker Server shows complete Index and Savesets
    Carlos Rojas

    Hi herbert,

     

    Just a silly question,

     

    Are all the savesets browsable?

     

    Which savesets do you think are missing or you are not able to browse?

     

    As far as I know directed restore of VSS savesets is not supported, as per documentation:

     

    Directed recovery of SYSTEM or VSS SYSTEM save sets is not supported.

     

    Page 331

    EMC® NetWorker® Release 7.6 Service Pack 3 Administration Guide

    P/N 300-013-301 REV A01

     

    Thank you.

    Carlos.

  • 5. Re: Netwoker User cannot see all savesets during recover, but Networker Server shows complete Index and Savesets
    hwilfing

    Hi,

    no, just 2 of 5 are browsable (at least via NetWorker User program).

    Although, all recent backup completion notes show everything backed up correctly (drives P:, H:, G:, F: and E are successfully backed up:

    * cluster.domain.com:All savefs cluster.domain.com: succeeded.

      cluster.domain.com: P:\ ...

      cluster.domain.com: H:\ ...

      cluster.domain.com: G:\ ...

      cluster.domain.com: F:\ ...

      cluster.domain.com: E:\ ...

    )

     

    but only H: and E: drives are browsable (from any Windows client - using NetWorker User for directed recover - who's been granted remote access permissions). After another re-installation of the NetWorker 7.6.3 (previously it's been 7.6.2) the P: drive is visible as well (again regardless which Windows client is browsing via NetWorker User - but this is possibly just a coincidence!)

     

    So finally F: and G: are still missing. Additional info: this client is a file server (which you may have presumed already)

     

    Br.

    Herbert

  • 6. Re: Netwoker User cannot see all savesets during recover, but Networker Server shows complete Index and Savesets
    Carlos Rojas

    Hi Herbert,

     

    Have you set the correct entries in the 3 client entries (physical nodes and virtual node) to allow remote access?

     

    Set the correct entries in the Remote Access field in the 3 client entries configuration:

     

    • The user must have the Remote Access All Clients privilege or the user@destination_client must be listed in the source client’s Remote Access list.

     

    • The user@destination_client must have the Recover Local Data privilege.

     

    • The user@administering_client must be added to the Windows Administrator Group on the administering client.

     

    Recovering data from a shared disk that belongs to a virtual client:


    To recover data backed up from a shared disk that belongs to a virtual client:

     

    1. Ensure that you have properly configured the virtual client for remote access from your current node:

     

    a. From the Administration window, click Configuration.

    b. In the left pane, select Clients.

    c. From the File menu, select Properties and then select the select the Globals 2 of 2 tab.

    d. Make sure that the Remote Access attribute of the virtual client for which you want to recover the data contains the name of the physical host you are using to recover the data.

     

    For example:

    root@physical_hostname

     

    2. Make sure that the file systems of the virtual client are mounted.

     

    3. Recover data from a shared disk that belongs to a virtual client.

     

    • To recover the data by using the nwrecover program, make sure that you select the virtual client.

    • To perform a command line recovery, enter the recover command with the -c option at the command prompt. The -c option must be followed by the name of the client you are attempting to recover.

     

    For example:

    recover -s server_name -c virtual_client

     

    The recover man page or the EMC NetWorker Command Reference Guide provide information.

     

    The reason why restore could work once after reinstallation is because the /nsr/nsrladb folder gets overwritten

     

    Thank you.

    Carlos.