Dell PowerProtect Data Manager Appliance 5.12.0.1 Network Attached Storage User Guide

Consecutive incremental backups fail

Perform a manual full backup of the NAS asset. The PowerProtect Data Manager Appliance Administrator Guide provides instructions.

Unable to back up a NAS appliance because of connectivity errors

You may receive error messages such as Unable to communicate with NAS appliance when the appliance does not respond as expected and backups may fail to start.

Verify that the NAS appliance is available. Verify connectivity between PowerProtect Data Manager Appliance, the protection engine, and the NAS appliance. Verify the appliance and management credentials and, if required, update the stored appliance credentials.

Unable to back up CIFS shares on PowerScale/Isilon appliances after updating PowerProtect Data Manager Appliance

Perform a manual full backup and then verify that subsequent backups succeed.

Unable to back up share assets

Verify that the share address and path are valid and mountable. Adding a share does not verify that the share can be backed up.

Unable to discover assets

If the first discovery succeeds and later discoveries fail, verify whether the asset credentials have changed. Update the credentials in PowerProtect Data Manager Appliance accordingly.

Unable to move backups to Protection Storage

Verify that there is sufficient free space on the protection storage system.

Unable to process backup when a file/folder name exceeds 255 bytes

By default, if a NAS share file or folder name exceeds 255 bytes, it will be skipped during the backup. Such skipped elements can be backed up by making changes in the config file. Contact Customer Support to know the procedure.

Unable to restore NFSV4 shares in PowerScale/Isilon

If the NFSV4 ACLs are not restored properly in a UID/GID environment, set the following permissions in the PowerScale/Isilon. This ensures that NFSV4 ACLs are backed up and restored properly.

• For backup, in PowerScale UI, Protocols > UNIX sharing (NFS) > Zone settings, enable the Enable NFSV4 no names option.
• For restore, on the destination export, where you perform restore, set --lookup-uid to true using the below commands.

  isi nfs exports modify export_id --map-root-enabled false
   isi nfs exports modify export_id --map-lookup-uid true

  • Use isi nfs exports export_id view to check the values.
  • Use isi nfs exports list to get the export list and their IDs.

Unable to restore NFSV4 shares in PowerScale/Isilon

When trying to recover a top-level folder of an NFSV4 or later version shares that are deleted, the restore operation fails with a stale handle error.

As a workaround, in the PowerScale UI, Protocols > UNIX sharing (NFS) > Global settings, in the Cached export configuration section, click Reload to clear the cached NFS export settings and perform the restore operation again.

Unable to backup NAS shares while restoring more than 400 slices

NAS shares backup fails when a restore is initiated simultaneously for more than 400 slices, which occupies the NAS proxy space. To troubleshoot this issue perform either of the following actions:

• Increase the NAS proxy space.
• Perform restore in multiple sessions.