Installation and User's Guide

example, because C:\windows\system32\ntoskrnl.exe is part of the Windowssystem state, it is not backed up during an incremental or selective backup of theC: drive.Related conceptsChapter 9, “Storage management policies,” on page 235“Management classes and copy groups” on page 236Related tasks“Backing up system objects (Windows XP)” on page 122“Backing up Windows system state” on page 123Open file support for backup operationsThere are two snapshot providers that can be used for open file support: LVSA andVSS. You cannot use VSS on a Windows XP platform.VSS is the preferred provider, since it utilizes the strategic snapshot solution fromMicrosoft. The LVSA is provided for customers migrating from prior versions ofTivoli Storage Manager, where LVSA was utilized, and as an alternative to VSS ifthere are issues with using VSS.Some applications can create files and open these files in a way that denies accessto all other processes on a Microsoft Windows operating system. Although this isnot a common practice, it is sometimes used by database vendors or otherapplications that might want to limit access to certain files. By restricting access tothese files, backup products are prevented from backing up this data. These lockedfiles are not the same as files which are open or in use. Tivoli Storage Manager,running without the open file support (OFS) feature, can back up open or in usefiles, including files that are open for reading or writing, files that are changingduring the backup, executable and dll files that are running, log files that are beingappended to, etc.You can create OFS or online image backups on workstations with a singleNTFS-based C: drive.The following is the error message that is seen in the dsmerror.log when a TivoliStorage Manager backup encounters one of these locked files without OFS supportenabled:ANS4987E Error processing ’\\machine1\d$\dir1\lockedfile.xyz’: the object is in useby another processANS1228E Sending of object ’\\machine1\d$\dir1\lockedfile.xyz’ failedOFS should not be used for backing up locked Windows system files, such assystem objects (Windows XP) and system state (Windows Server 2003, WindowsServer 2008, Windows Vista, and Windows 7). The Tivoli Storage Tivoli StorageManager client has advanced features for backing up data contained within thesefiles. The backup of the system data that is contained in these files requiresadditional processing and must be backed up in a group to allow for a successfulrestore. These files are excluded from the Tivoli Storage Manager file level backup.For database applications that use certain files for transactional consistency (forexample, a recovery log file), it might not be possible to back up and restore thesefiles without database coordination. In these situations, do not back up thesedatabase files with the normal Tivoli Storage Manager file level backup. You canexclude these files from backup processing using an exclude or exclude.dirChapter 4. Backing up your data 99