Administrator Guide

Table Of Contents
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.)
7. Drive Addition is selected by default. Leave this option selected.
8. 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. If the Storage Manager Client is connected to a Data Collector, select a Storage Center from the Storage view.
2. Click the Storage tab.
3. In the Storage tab navigation pane, click Storage Types, then click the Storage Types subtab.
4. Right-click the Storage Type to modify and select Modify Tier Redundancy.
The Modify Tier Redundancy dialog box opens
5. 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.
6. For Redundant Storage Types, you must select a redundancy level for each tier unless the drive type or size requires a
specific 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.)
7. Drive Addition is selected by default. Leave this option selected.
8. Click OK.
A RAID rebalance starts.
Storage Center Maintenance
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