Re: Journal Based Backup and Legato Networker

Some cases I can think of where the archive bit is not a reliable
indicator:

- If you change the read-only attribute via Windows Explorer/file
properties.

- If you modify the file, but then the archive bit is turned off either
manually or via some other utility.

- The archive bit is turned on either manually or via some other utility
when the file has not changed.

TSM does not use the archive bit to determine whether a file has changed.
Please refer to the Windows client manual, chapter 4 "Backing up files and
directories", section "Backing up files and directories", subsection "Full
and partial incremental backup" for specific information on what factors
TSM considers.

For Journaled backups, you can refer to the client manual, appendix D
"Journal service configuration", section "JournaledFileSystemSettings
stanza" for information on what kinds of changes can be monitored by the
journal service (you can customize these settings). The journal service
uses the Microsoft API function ReadDirectoryChangesW() to monitor file
systems for changes. You can find additional information on this at the
Microsoft MSDN site, msdn.microsoft.com. Do a search on
ReadDirectoryChangesW and you will find the reference information for this
function.

Regards,

Andy

Andy Raibeck
IBM Software Group
Tivoli Storage Manager Client Development
Internal Notes e-mail: Andrew Raibeck/Tucson/IBM@IBMUS
Internet e-mail: storman AT us.eyebm DOT com (change eye to i to reply)

The only dumb question is the one that goes unasked.
The command line is your friend.
"Good enough" is the enemy of excellence.




"Rupp Thomas (Illwerke)" <thomas.rupp AT ILLWERKE DOT AT>
Sent by: "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>
01/10/2003 02:31
Please respond to "ADSM: Dist Stor Manager"


        To:     ADSM-L AT VM.MARIST DOT EDU
        cc:
        Subject:        Journal Based Backup and Legato Networker



Hi *SM-ers,

could one of the knowing (ex)-Networker users help me in interpreting the
following sentence
in the "Legato NetWorker, Release 6.2, Microsoft Windows Version
Administrator's Guide",
page 593:

"When using the Change Journal, the NetWorker software can detect more
types of changes and can save more changed files than is possible when not
using the Change Journal."

Networker uses the MS Windows 2000/XP builtin Journal.
So does this mean that a "normal" incremental backup doesn't get all
changes?
As I understand Networker uses the archive flag and the last modified
date.

What kind of changes could go unidentified?

Is my understanding correct that TSM always gets all changes (incremental
or
journal based
backup)?

Kind regards
Thomas Rupp
Vorarlberger Illwerke AG