Installation and User's Guide

vchanged on the volume and the change is detected by NetApp,signalling Tivoli Storage Manager to back it up again.Policy changes such as changing the policy from mode=modified tomode=absolute are not detected.v The entire file space is deleted from the Tivoli Storage Managerinventory. This action causes the snapdiff option to create a newsnapshot to use as the source, and a full incremental backup to be run.The NetApp software determines what is a changed object, not TivoliStorage Manager.Selective backupUse a selective backup when you want to back up specific files or directoriesregardless of whether a current copy of those files exists on the server.Incremental backups are generally part of an automated system to back up entirefile systems. In contrast, selective backups allow you to manually select a set offiles to back up regardless of whether they have changed since your lastincremental backup.Unlike incremental backups, a selective backup provides the following:v Does not cause the server to update the date and time of the last incremental.v Backs up directory and file entries even if their size, modification timestamp, orpermissions have not changed.v Does not expire deleted files.v Does not rebind backup versions to a new management class if you change themanagement class.Related tasks“Backing up data using the GUI” on page 101Related reference“Selective” on page 654Backing up files from one or more file spaces for a group backup(Windows)You can use the backup group command to create and back up a group containinga list of files from one or more file space origins to a virtual file space on the TivoliStorage Manager server.A group backup allows you to create a consistent point-in-time backup of a group offiles that is managed as a single logical entity:vvvvAll objects in the group are assigned to the same management class. Use theinclude option to bind a group to a management class.Existing exclude statements for any files in the group are ignored.All objects in the group are exported together.All objects in the group are expired together as specified in the managementclass. No objects in a group are expired until all other objects in the group areexpired, even when another group they belong to gets expired.A group backup can be added to a backup set.You can perform a full or differential backup using the mode option.118 IBM Tivoli Storage Manager for Windows Backup-Archive Clients: Installation and User's Guide