Administrator Guide

9. Click OK.
Modify Tier Redundancy
Modify tier redundancy to change the redundancy level for each tier in a Storage Type. After modifying tier redundancy, a RAID
rebalance is required to move data to the new RAID levels.
About this task
NOTE: Do not modify tier redundancy if there is insufficient space in the tier for a RAID rebalance.
Steps
1. Expand the Dell Storage Manager menu, and then click Storage.
2. In the SC Series tab, select a Storage Center to open the Storage Center view.
3. Click the Storage tab, and then click the Storage Types subtab.
4. Select the Storage Type to modify.
5. Click Edit. The Edit dialog box opens.
6. Modify the redundancy for each tier as needed.
For single-redundant RAID levels, select Redundant.
For dual-redundant RAID levels, select Dual Redundant.
7. Click OK. A RAID rebalance starts.
Shutting Down and Restarting a Storage Center
Shutting down or restarting a Storage Center affects all controllers.
Shut Down a Storage Center
Shutting down a Storage Center creates a system outage, during which time no IO is processed. Use this process only as directed,
for example to replace hardware, to move the Storage Center to another location, or to shut down for data center power
maintenance.
Prerequisites
An outage must be scheduled so that halting IO does not impact your network.
IO to the controllers must be halted.
Steps
1. Expand the Dell Storage Manager menu, and then click Storage.
2. In the SC Series tab, select a Storage Center.
3. In the Summary tab, click More ActionsSystemShutdown/Restart. The Shutdown/Restart dialog box opens.
4. From the first drop-down menu, select Shutdown Controller.
5. Click OK.
Restart a Storage Center
If the Storage Center has dual-controllers, the controllers can be restarted in sequence or simultaneously.
1. Expand the Dell Storage Manager menu, and then click Storage.
2. In the SC Series tab, select a Storage Center.
3. In the Summary tab, click More ActionsSystemShutdown/Restart. The Shutdown/Restart dialog box opens.
4. From the first drop-down menu, select Restart Controller.
5. (Dual-controller only) From the Restart options drop-down menu, choose how you want the controllers to restart.
To restart the controllers one after the other, avoiding an outage, select Restart in Sequence.
To restart the controllers at the same time, causing an outage, select Restart Simultaneously.
6. Click OK.
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Storage Center Maintenance