The archive bit which the full and differential backups clear is a
facility of the file system.  Whether you are running NTFS or EXT3 the
archive bit is kept per file at the file system level.  It doesn't
matter WHAT backup software you use to clear the archive bit,
incremental backups will only backup files with the archive bit set and
fulls will backup EVERYTHING.  The only difference is that full and
differential backup RESET the archive bit if it is set.  Essentially,
anytime you change a file (open it, save it) the archive bit gets set to
"1" or "please back me up."  When a full or differential backup comes
along it backs up the file and clears the archive bit.  This really has
nothing to do with Netbackup or policies.  You can run simple backups
via windows backup and it still uses the same archive bit.  At one point
I was using WinZip to clear archive bits and rub remote backups while a
tape library was down.
 
-Jonathan

________________________________

From: veritas-bu-bounces at mailman.eng.auburn.edu
[mailto:veritas-bu-bounces at mailman.eng.auburn.edu] On Behalf Of WEAVER,
Simon
Sent: Tuesday, August 29, 2006 12:28 PM
To: veritas-bu at mailman.eng.auburn.edu
Subject: [Veritas-bu] Clarification - Policies


All
I just wanted clarification on this, to be 100% sure I understand what
is happening.
 
NBU 5.1 MP2 Win2k3 + 2 SAN Media Servers + thousands of clients
 
Scenario: Have a Policy that does Incr & Full for CLIENT1 - Policy is
called "Backup_Client1"
I have have a 2nd Policy, that is deactivated called
"Manual_Backup_Client1"
 
now, lets assume the full backup for Client1 failed. If I turn on the
Manual_Backup_Client1 policy, it performs and completes the backup
without any problems.
 
But am I right in thinking the archive bit would be set correctly, so
that when the Policy "Backup_Client1" runs, it is "aware" a full backup
was completed successfully?
 
My thinking is, the policy WONT have a clue, as the Policy that
performed the backup is different, and therefore may not share this
info!
 
Clarification?
 
Thanks

Regards

Simon Weaver
3rd Line Technical Support
Windows Domain Administrator 

EADS Astrium Limited, B23AA IM (DCS)
Anchorage Road, Portsmouth, PO3 5PU

Email: Simon.Weaver at Astrium-eads.net
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