9.5.01 HP P4000 SAN Solution User Guide (AX696-96168, February 2012)

5 Setting the date and time
The storage systems within management groups use the date and time settings to create a time
stamp when data is stored. You set the time zone and the date and time in the management group,
and the storage systems inherit those management group settings.
• Using network time protocol
Configure the storage system to use a time service, either external or internal to your network.
• Setting the time zone
Set the time zone for the storage system. The time zone controls the time stamp on volumes
and snapshots.
If you use NTP, decide what time zone you will use. You can use either GMT on all of your
management groups, or you can set each management group to its local time.
If you do not set the time zone for each management group, the management group uses the
GMT time zone, whether or not you use NTP.
• Setting date and time
Set the date and time on the management group(s) if not using an NTP time service.
Management group time
When you create a management group, you set the time zone and the date and time while going
through the Management Groups, Clusters and Volumes wizard. This ensures that all the storage
systems in the management group have the same time setting.
Getting there
1. In the network window, select a management group and log in.
2. Click the Time tab.
Refreshing the management group time
Use Refresh All to update the view of the time on all storage systems in the management group.
This view is not updated automatically, so you must refresh the view to verify that the time settings
on the storage systems are what you expect.
1. Select a management group.
2. Click the Time tab.
3. Select Time Tasks, and select Refresh All.
After processing, all storage systems display the current time.
Using NTP
Network time protocol servers (NTP) can manage the time for the management group instead of
using the local system time. NTP updates occur at five-minute intervals. If you do not set the time
zone for the management group, it uses GMT.
Management group time 77