Change RAID level for a volume group
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You can change the RAID level for a volume group to accommodate the performance needs of the applications that are accessing the volume group. This operation changes a volume group's RAID level without impacting data I/O.
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The volume group must be in Optimal status.
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You must have enough capacity in the volume group to convert to the new RAID level.
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You cannot change the RAID level of a pool. System Manager automatically configures pools as RAID 6.
You cannot cancel this operation after it begins. Your data remains available during this operation.
More about RAID levels
| RAID Level | Description |
|---|---|
RAID 0 striping |
Offers high performance, but does not provide any data redundancy. If a single drive fails in the volume group, all of the associated volumes fail, and all data is lost. A striping RAID group combines two or more drives into one large, logical drive. |
RAID 1 mirroring |
Offers high performance and the best data availability, and is suitable for storing sensitive data on a corporate or personal level. Protects your data by automatically mirroring the contents of one drive to the second drive in the mirrored pair. It provides protection in the event of a single drive failure. |
RAID 10 striping/mirroring |
Provides a combination of RAID 0 (striping) and RAID 1 (mirroring), and is achieved when four or more drives are selected. RAID 10 is suitable for high volume transaction applications, such as a database, that require high performance and fault tolerance. |
RAID 5 |
Optimal for multi-user environments (such as database or file system storage) where typical I/O size is small and there is a high proportion of read activity. |
RAID 6 |
Optimal for environments requiring redundancy protection beyond RAID 5, but not requiring high write performance. |
RAID 3 can be assigned only to volume groups using the command line interface (CLI).
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Select .
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Select the volume group that you want to edit, and then click View/Edit Settings.
The Volume Group Settingsdialog box appears.
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Select the RAID level from the drop-down list, and then click Save.
A confirmation dialog box appears if capacity is reduced, volume redundancy is lost, or shelf/drawer loss protection is lost as a result of the RAID level change. Select Yes to continue; otherwise click No.
When you change the RAID level for a volume group, System Manager changes the RAID levels of every volume that comprises the volume group. Performance might be slightly affected during the operation.