Because when you run your differential incrementals, the archive bit will be
set. If you try to do a cumulative after a differentail (or the other way
around), nothing has its archive bit in a state that says it needs to be backed
up.
Unix uses the data/time of the last successfull backup of the policy. Since
both would look back to the last schedule of type FULL, they should get the
right info.
I really never thought of doing it that way.
Bobby
From: Gary Williams <gjwilliams at ybs.co.uk>
Date: 2006/11/09 Thu AM 10:38:53 EST
To: veritas-bu at mailman.eng.auburn.edu
Subject: [Veritas-bu] Windows Differential / Cumulative Backups
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Hi,
In our "Unix" world we do a full backup monthly, ( 12 months retention ), a
differential incremental Monday - Friday ( 14 days retention), and a cumulative
incremental at the weekends ( 1 month retention ), which satisfies our
requirements. We are now starting to migrate our "Windows" world into Netbackup
and our immediate plan was to implement the same strategy as used in Unix.
However, we have found some documentation which recommends not mixing
differentials and cumulatives in the Windows arena. I was hoping that someone
could clarify this for me, and if possible explain the reasons why.
?
Regards
Gary
?
?
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