Managing Serviceguard Eighteenth Edition, September 2010

• You cannot do online configuration as described under “Reconfiguring a Package”
(page 385).
• You cannot configure new dependencies involving this package; that is, you cannot
make it dependent on another package, or make another package depend on it.
See also “Dependency Rules for a Package in Maintenance Mode or Partial-Startup
Maintenance Mode ” (page 356).
• You cannot use the -t option of any command that operates on a package that is
in maintenance mode; see “Previewing the Effect of Cluster Changes” (page 361)
for information about the -t option.
Additional Rules for Partial-Startup Maintenance Mode
• You must halt the package before taking it out of partial-startup maintenance
mode.
• To run a package normally after running it in partial-startup maintenance mode,
you must take it out of maintenance mode, and then restart it.
Dependency Rules for a Package in Maintenance Mode or Partial-Startup Maintenance Mode
You cannot configure new dependencies involving a package running in maintenance
mode, and in addition the following rules apply (we'll call the package in maintenance
mode pkgA).
• The packages that depend on pkgA must be down with package switching disabled
when you place pkgA in maintenance mode. This applies to all types of dependency
(including exclusionary dependencies) as described under “About Package
Dependencies” (page 179).
— You cannot enable a package that depends on pkgA.
— You cannot run a package that depends on pkgA, unless the dependent package
itself is in maintenance mode.
• Dependency rules governing packages that pkgA depends on to be UP are bypassed
so that these packages can halt and fail over as necessary while pkgA is in
maintenance mode.
• If both packages in a dependency relationship are in maintenance mode,
dependency rules are ignored for those two packages.
For example, both packages in an exclusionary dependency can be run and halted
in maintenance mode at the same time.
Performing Maintenance Using Maintenance Mode
You can put a package in maintenance mode, perform maintenance, and take it out of
maintenance mode, whether the package is down or running.
This mode is mainly useful for making modifications to networking or EMS resources.
To modify other components of the package, such as services or storage, follow the
356 Cluster and Package Maintenance