Two-Site Failure Scenarios That Are Correctly Using A Virtual Manager; Requirements For Using A Virtual Manager - HP StorageWorks P4000 User Manual

quorum. To regain quorum, you start the virtual manager on a storage system that is operating and
in the site that is operational or primary.
Table 38 Requirements for using a virtual manager
Requirement
Use a virtual manager with an
even number of regular managers
running on storage systems
Add a virtual manager when creat-
ing management group.
A virtual manager must run only
until the site is restored or commu-
nication is restored.
Correct uses of a virtual manager are shown in
Figure 60 Two-site failure scenarios that are correctly using a virtual manager
.
What it means
Disaster recovery scen- Number of regular
ario managers running
Two separate sites with
shared data
Two storage systems in
management group
You cannot add a virtual manager after quorum has been lost. The virtual
manager must be added to the management group before any failure
occurs.
The virtual manager should run only until the site is restored and data is
resynchronized, or until communication is restored and data is resynchron-
ized.
Figure 60
Total number of man-
agers, including the
virtual manager
4
2
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