Installation and User's Guide

to restore a file you have deleted, and if a full incremental backup has been runsince you deleted the file, then you need to restore an inactive version of the file(assuming that a version still exists on the server). The number of inactive versionsmaintained by the server and how long they are retained is governed by themanagement policies defined by your server administrator. The purpose of theactive versions is to represent which files existed on your file system at the time ofthe backup.To perform a full or partial incremental backup using the client Java GUI, selectthe incremental (complete) option from the pull-down menu at the top of thescreen on the backup window, or use the incremental command in thecommand-line interface. Specify file systems, directory trees, or individual files toinclude in the backup.During an incremental backup, the client queries the server or the journal databaseto determine the exact state of your files since the last incremental backup. Theclient uses this information to perform the following tasks:v Back up new files.vvvvvUpdate the attributes on the server. Changes to read-only, hidden andcompressed file attributes causes Tivoli Storage Manager to send only attributechanges to the server. Changes to sparse file, reparse point, and encrypted fileattributes cause Tivoli Storage Manager to send the entire file to the server. Thearchive attribute is not examined by Tivoli Storage Manager in determiningchanged files.Back up files whose contents changed since the last backup.Changes include any of the following:– File size– Date or time of last modification– Extended Attributes– Access Control List– Sparse, reparse point or encrypted file attributes.– NTFS file security descriptors. These are the Owner Security Identifier (SID),Group SID, Discretionary Access Control List (ACL), and System ACL.Expire backup versions of files on the server that do not have correspondingfiles on the workstation. The result is that files which no longer exist on yourworkstation will not have active backup versions on the server. However,inactive versions are retained according to rules defined by the Tivoli StorageManager administrator.Rebind backup versions if management class assignments change. Only objectsthat have active backup versions are rebound. Objects for which only inactivebackup versions exist are not rebound.Important: Each directory is also backed up under the following circumstances:v It has not been backed up previouslyv Its permissions have changed since the last backupv Its Access Control List has changed since the last backupv Its Extended Attributes have changed since the last backupv Its time stamp has changed since the last backupYou might be able to use the preservelastaccessdate option during a backup orarchive operation to specify whether to reset the last access date to its originalvalue following a backup or archive operation. By default, the Tivoli StorageChapter 4. Backing up your data 113