Installation and User's Guide

vvNAS nodes represent a new node type. The NAS node name uniquely identifiesa NAS file server and its data to Tivoli Storage Manager. You can prefix the NASnode name to the file specification to specify the file server to which the includestatement applies. If you do not specify a NAS node name, the file system youspecify applies to all NAS file servers.Regardless of client platform, NAS file system specifications use the forwardslash (/) separator, as in this example: /vol/vol0.v NAS file system designations on the command line require brace delimiters {}around the file system names, such as: {/vol/vol0}. Do not use brace delimitersin the option file.Note: When you initiate a NAS backup operation using the client command lineinterface, client GUI, or Web client the server starts a process to initiate, control,and monitor the operation. It might take several moments before you noticeprogress at the client command line interface because the server must perform amount and other necessary tasks before data movement occurs.Related reference“Toc” on page 496Methods for backing up and recovering data on NAS fileservers when using CIFSTivoli Storage Manager can process network attached storage (NAS) file-serverdata that is accessed using the Common Internet File System (CIFS).You can use the following methods to back up and recover data on NAS devices:v Use a Tivoli Storage Manager backup-archive client to back up and restore data,by using CIFS or NFS to access files from the backup-archive client. Data can bestored on the Tivoli Storage Manager server with file-level granularity, by usingthe progressive-incremental backup method. The data is stored in the TivoliStorage Manager storage hierarchy and can be migrated, reclaimed, and backedup to a copy storage pool.This method increases processor usage when the Tivoli Storage Manager clientaccesses individual files. The method requires that data flow through the TivoliStorage Manager client. This method also requires that the data flows throughthe Tivoli Storage Manager server unless a LAN-free configuration is used.v Use the snapdiff option to mitigate the performance problems of CIFS backup.This option stores data with file-level granularity using progressive incrementalbackup for NFS or CIFS.v Use a Tivoli Storage Manager backup-archive client running on the NAS device,provided that you can use external programs with the NAS operating system.This method decreases processor usage of CIFS or NFS. Data can be stored onthe Tivoli Storage Manager server with file-level granularity usingprogressive-incremental backup. The data is stored in the Tivoli Storage Managerstorage hierarchy and can be migrated, reclaimed, and backed up to a copystorage pool. This method requires that data flow through the Tivoli StorageManager client. This method also requires that the data flows over a networkand through the Tivoli Storage Manager server unless a LAN-free configurationis used.v Use NDMP with Tivoli Storage Manager. File systems are backed up as fullimages (all files) or differential images (all files that have changed since the lastfull backup). Backed up images are stored on a tape device that is accessed bythe NAS file server. This method provides high performance because there is no140 IBM Tivoli Storage Manager for Windows Backup-Archive Clients: Installation and User's Guide