NetBackup™ NAS Administrator's Guide
- Section I. About NAS backups
- Section II. Using NAS-Data-Protection (D-NAS)
- D-NAS overview
- D-NAS Planning and Tuning
- Pre-requisites for D-NAS configuration
- Configuring Storage Lifecyle Policies for D-NAS
- Snapshot operation in SLP
- Index from snapshot operation in an SLP
- Retention types for SLP operations
- Volume multi-host backup
- Configure D-NAS policy for NAS backups
- Configuring the Start window
- Using Accelerator
- Using Vendor Change Tracking
- Using true image restore
- Replication using D-NAS policy
- Restoring from D-NAS backups
- Multi-stream restores from D-NAS backups
- Multi-stream restores from D-NAS backups
- Troubleshooting
- Section III. Using NDMP
- Introduction to NetBackup for NDMP
- About NetBackup for NDMP
- Types of NDMP backup
- About assigning tape drives to different hosts
- Installation Notes for NetBackup for NDMP
- Configuring NDMP backup to NDMP-attached devices
- About Media and Device Management configuration
- Using the Device Configuration Wizard to configure an NDMP filer
- About creating an NDMP policy
- Backup selection options for an NDMP policy
- About enabling or disabling DAR
- Configuring NDMP backup to NetBackup media servers (remote NDMP)
- Configuring NDMP DirectCopy
- Accelerator for NDMP
- Remote NDMP and disk devices
- Using the Shared Storage Option (SSO) with NetBackup for NDMP
- NAS appliance information for NDMP
- Vendor-specific information
- EMC Celerra
- NetApp
- Using NetBackup with NetApp's Data ONTAP 8.2 cluster mode
- Using NetBackup with NetApp's Data ONTAP 8.2 cluster mode
- Backup and restore procedures
- Troubleshooting
- Using NetBackup for NDMP scripts
- Introduction to NetBackup for NDMP
About the Overwrite existing file option during restore
For D-NAS restores, it is recommended to enable the
option to restore the directory metadata.In D-NAS backups, the files and folders of the NAS share are backed up in different backup images. During a restore, a file inside a directory may get restored first, and then the directory gets restored from another backup image. For example, the file /vol/dir/file
is in the image: image1
, and the directory /vol/dir
is in the image: image2
. During a restore, the image1
contents may get restored first, when the directory is not present. At this point, NetBackup creates the directory, but without the attributes of the original directory. During the restore from image2
, the restore process finds that the directory is already created, and it must be replaced to restore the original directory attributes. So, to restore directory metadata, the option must be enabled during restore.