Stopping managers
Under normal circumstances, you stop a manager when you are removing a storage system from
a management group. Stopping a manager that will compromise fault tolerance generates an
alarm. You cannot stop the last manager in a management group. The only way to stop the last
manager is to delete the management group, which permanently deletes all data stored on volumes
in the management group.
Implications of stopping managers
•
Quorum of the storage systems may be decreased. See
“Managers and quorum” (page 119)
.
•
Fewer copies of configuration data are maintained.
•
Fault tolerance of the configuration data may be lost.
•
Data integrity and availability may be compromised.
1.
In the navigation window, select a management group, and log in.
2.
Select the storage system for which you want to stop the manager.
3.
Click
Storage System Tasks
on the Details tab, and select
Stop Manager
.
A confirmation message opens.
4.
Click
OK
to confirm stopping the manager.
Editing a management group
Editing management group tasks include the following items:
•
Changing local bandwidth priority. See
“Setting or changing the local bandwidth priority”
(page 113)
.
•
Editing Remote Bandwidth. See the HP LeftHand Storage Remote Copy User Guide, in “Chapter
2, Using Remote Copy,” the section about setting the remote bandwidth.
Specialized editing tasks include:
•
Disassociating management groups. See the HP LeftHand Storage Remote Copy User Guide,
in “Chapter 2, Using Remote Copy,” the section about disassociating remote management
groups.
•
Setting Group Mode to normal. See
“Manually changing the management group to normal
mode” (page 115)
.
After making any changes to the management group, be sure to save the configuration data of
the edited management group. See
“Saving the management group configuration information”
(page 114)
.
Setting or changing the local bandwidth priority
After a management group has been created, edit the management group to change the local
bandwidth priority. This is the maximum rate per second that a manager devotes to non-application
processing, such as moving data. The default rate is 16 MB per second. You cannot set the range
below 0.25 MB/sec.
1.
In the navigation window, select the management group and log in.
2.
Click
Management Group Tasks
on the Details tab, and select
Edit Management Group
.
3.
Change the local bandwidth priority using the slider.
The default setting of 16, at the Application Access end of the slider, is more appropriate for
everyday situations where many servers are busy with the volume. A setting of 40, at the Data
Rebuild end of the slider, is most commonly used for quick data migration.
4.
Click
OK
.
The new rate appears on the Details tab in the management group tab window.
Management group maintenance tasks
113