This may be of interest here. From the 6.5 release notes page 14.
In NetBackup 6.5, Symantec provides Release Updates instead of
maintenance packs for each of its major product releases. (This new release
model does not affect earlier versions of NetBackup.)
Maintenance packs continue to be a useful method of providing product
fixes to our customers, but they can be restrictive. The new Release Update
model enables Symantec to continue:
■ To provide the same level of fixes as before
■ To provide new and timely features that are complete with documentation, training,
and a full release test verification with each Release Update.
Symantec considered, the content and size of each release, and the
frequency in which a new update would occur when it designed this release
model. Symantec decided to provide our customers with new features in a
shorter range of time; rather than wait as long as two years for the next
major release. By including new features with each Release Update,
NetBackup customers can take advantage of those features much sooner,
and enable them to do their job more efficiently. Features in Release Updates
are smaller, non-invasive features, that are available to those who want
them and harmless to those who do not.
With a new release model comes a new labeling scheme. Release Updates are
numbered according to the major NetBackup release that it corresponds
with. For example, the first release update after NetBackup 6.5 GA releases
are labeled, NetBackup 6.5.1, the second will be 6.5.2, and so on.
How often will Release Updates become available? Our intent is to deliver
our first Release Update (6.5.1) about 3 months after a major release has
officially shipped. After this, the users can expect to see the next three
Release Updates to be released every four months in succession (6.5.2 -
6.5.4). After that, Release Updates will be released every six months.
