Dell Compellent Series 30 - Manual (Page 126)

118 Storage Center 5.5 System Manager User Guide
Disks
7 Select disks to be designated as hot spares. If a disk fails, Storage Center automatically
rebuilds the data that was on the failed disk on to the spare disk. Hot spares do not count
toward usable storage, but each disk spare adds to the resiliency of your system.
Depending on your configuration, select one or more disks as spares.
8 Click Continue. The system indicates that the folder will be modified.
Figure 91. Assigned Folder Modified
9 Click Modify Now. The disks are added to the assigned disk folder. A window allowing
you to rebalance RAID devices appears.
Figure 92. Manage Disks Rebalance Window
• Modifying Storage allows you to configure a redundancy level (dual or single) for each
tier of storage within the disk folder. For more information, refer to
Configuring Storage
on page 120 . Be sure to modify storage before you rebalance new disks.
• Schedule Rebalance enables you to defer rebalancing until a later time.