Restore Data - NAS NDMP Client - Full System Restore

Topics | How To | Full System Restore | Related Topics

Overview

Rebuild a NAS File Server

Overview

The general procedure for a full system restore is to refer to the hardware vendor's documentation to rebuild or replace the file server. While rebuilding or replacing the NAS file server, consider the issues that follow to successfully complete the full system restore process.

The difference between a normal restore and a full system restore is the severity of the problem. Normally, if data is lost or removed, it is recovered from the archives using the normal restore procedures. However, when a normal restore operation cannot correct a software and/or hardware corruption problem, some additional changes may be required.

Rebuild a NAS File Server

The following describes the issues that need to be resolved in order to recover data for a NAS NDMP file server after it has crashed.

Original NAS File Server vs. New NAS File Server

If you are restoring data to the same NAS File Server, the configuration information will be the same as the original server. Otherwise, if restoring data to a new NAS File Server, a new NAS client needs to be configured.

Configuration information for a NAS File Server includes a fully qualified network name, login and password for the NDMP account, etc. If applicable, also consider the hardware and disk shelf configuration of the original server, storage capacity of shares and exports, tape drive type if connected to a library, etc.

Issue

If Yes....

If No...
Will data be restored to the original NAS File Server?
  1. Perform a restore on the same computer. See Restore Destinations for details.
  1. Perform a restore on a  different computer. See Restore Destinations for details.
 
  1. Continue to the next step.
  1. Add a Client for NAS NDMP.
Will the same host name be used for the NAS client to communicate with the NAS File Server?
  1. No action is required.
  1. Change the host name for the NAS client. See Add a Client for NAS NDMP for details.
Will the same account (login/password) be used to access the NAS File Server?
  1. No action is required.
  1. Change the login/password of the NAS Client. See Change Account for Accessing Application Servers/Filers for details.

 

Original Location vs. New Location

If you are restoring data to the same location (e.g., file system/mount path name), an in-place restore will be used to restore the data. Otherwise, if restoring data to a new location, an out-of-place restore is performed.

Issue

If Yes....

If No...
Will data be restored to the original location?*
  1. Perform an in-place restore.**
  1. Perform an out-of-place restore.
 
  1. Continue to the next step.
  1. Continue to the next step.
While rebuilding the file system/mount path name, consider these issues:
  • Keep the minimum size the same as the original (it needs to be large enough to hold data from the previous backup).
  • Keep the number of inodes the same as the original.
  • If restoring data to the same NAS File Server (see Original NAS File Server vs. New NAS File Server), create a new subclient and edit the content path to reflect the new file system/mount path name.

* The file system/mount path names will be different for each vendor and are as follows:

Vendor

File System/Mount Path Example
Agami  
BlueArc  
DinoStor  
EMC Celerra  
Hitachi  
Isilon  
NetApp  
OnStor  
Pillar Data Systems  

*  The file system/mount path names will be different for each vendor and are as follows:

** Some in-place restores use the original file system/mount path names and configuration while others use new file system/mount path names and configurations.

Direct-Attached Storage (Drive Pool) vs. No Direct-Attached Storage

If you are restoring data to the same NAS client with the same direct-attached storage, changing the old access paths to new access paths is required. Otherwise, if restoring data to a NAS client other than the original, a new NAS client and new media needs to be configured; then the data from the backed-up data from the old drive pool needs to be migrated to the new drive pool.

Issue

If Yes....

If No...
Does the new NAS File Server have direct-attached storage?
  1. Continue to the next step.
  1. No action is needed. Stop here.
Is the NAS client an existing client?
  1. Continue to the next step.
  1. Add a Client for NAS NDMP.
Will the new NAS File Server use the same direct-attached storage?
  1. Run detect. See Direct-Attached Libraries - Configure.
  1. Run detect and configure the new media. See Direct-Attached Libraries - Configure.
 
  1. Change the old access paths to the new access paths of the library's arm changer and drives.
  1. Migrate the media from the old library to the new library.

 

Disk Storage (Magnetic Library) vs. No Disk Storage (Magnetic Library)

If you are restoring data to the a NAS File Server with the same type of disk storage (e.g., magnetic library or index cache) attached, an in-place restore will be used to restore the data.

Issue

If Yes....

If No...
Does the new NAS File Server have the same type of disk storage attached?
  1. Perform an in-place restore on the same computer. 
  1. No action is needed. Stop here.