Administrator Guide

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 insucient space in the tier for a RAID rebalance.
Steps
1 If you are connected to a Data Collector, select a Storage Center from the drop-down list in the left navigation pane.
2
From the STORAGE menu, select Storage Types.
The Storage Types view is displayed.
3 In the Storage Type area, select the Storage Type to modify, then click (Edit).
The Modify Tier Redundancy dialog box opens.
4 Modify the redundancy for each tier as needed.
• Redundant: Protects against the loss of any one drive (if single redundant) or any two drives (if dual redundant).
• Non-Redundant: Uses RAID 0 in all classes, in all tiers. Data is striped but provides no redundancy. If one drive fails, all data is lost.
NOTE: Non-Redundant is not recommended because data is not protected against a drive failure. Do not use non-
redundant storage for a volume unless the data has been backed up elsewhere.
5 For Redundant Storage Types, you must select a redundancy level for each tier unless the drive type or size requires a specic
redundancy level
• Single Redundant: Single-redundant tiers can contain any of the following types of RAID storage:
– RAID 10 (each drive is mirrored)
– RAID 5-5 (striped across 5 drives)
– RAID 5-9 (striped across 9 drives)
• Dual redundant: Dual redundant is the recommended redundancy level for all tiers. It is enforced for 3 TB HDDs and higher and for
18 TB SSDs and higher. Dual-redundant tiers can contain any of the following types of RAID storage:
– RAID 10 Dual-Mirror (data is written simultaneously to three separate drives)
– RAID 6-6 (4 data segments, 2 parity segments for each stripe)
– RAID 6-10 (8 data segments, 2 parity segments for each stripe.)
6 Drive Addition is selected by default. Leave this option selected.
7 Click OK.
A RAID rebalance starts.
Managing Disk Enclosures
Use the Hardware view to rename an enclosure, set an asset tag, clear the swap status for replaceable hardware modules in a disk
enclosure, mute alarms, reset the temperature sensors, and delete an enclosure from a Storage Center.
Add an Enclosure
This step-by-step wizard guides you through adding a new enclosure to the system.
Prerequisite
This wizard is available only for SCv2000 series and SCv3000 series arrays. This procedure can be performed without a controller outage.
Steps
1 If you are connected to a Data Collector, select a Storage Center from the drop-down list in the left navigation pane.
2 From the SYSTEM menu, select Hardware.
Storage Center Maintenance
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