Dell EqualLogic PS6210XS EqualLogic Group Manager Administrator s Guide PS Ser - Page 129
Supported RAID Policy Conversions, RAID Sets, Set RAID Expansion Status
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5. Click OK. Set RAID Expansion Status You can pause and resume the start of RAID expansion when new drives are added. This option allows more time when a large number of drives are added. 1. Click Group. 2. Expand Members and then select the member name. 3. Click Modify RAID configuration to open the Modify RAID Configuration dialog box. 4. In the RAID auto expansion panel, select one of the two options: • Check Enable RAID auto expansion to immediately expand group capacity. • Uncheck Enable RAID auto expansion to wait until the member storage initialization completes. NOTE: You must enable RAID auto expansion after all the drives have been installed. 5. Click OK. Supported RAID Policy Conversions While a member remains online, you can convert it from one RAID policy to another, but only if the new RAID policy does not reduce the amount of available disk space. For example, converting from RAID 10 to RAID 6 is allowed because it provides more disk space. Converting from RAID 50 to RAID 6 is allowed because it keeps the amount of disk space the same. Table 24. Supported RAID Policy Conversions shows the supported conversions for each RAID policy. Table 24. Supported RAID Policy Conversions Current RAID Policy RAID 10 RAID 50 RAID 5 RAID 6 RAID 6 Accelerated Supported Conversion All RAID 5, RAID 6 None None None RAID Sets The tables below show a logical drive layout when an array is initialized for the first time. The actual physical layout of drives can change and evolve due to maintenance and administrative actions. Spare drives can move as they are used to replace failed drives and newly added drives become the spares. NOTE: It is not possible to determine which physical drives are associated with each RAID set. This information is dynamic and maintained by the Dell EqualLogic firmware. Table 25. 12-Drive Configuration shows the RAID set relationship for each RAID type in a 12-drive configuration. Table 25. 12-Drive Configuration RAID Policy Spare Disks RAID Set Relationship RAID 6 1 (9+2) RAID 10 2 (5+5) RAID 50 2 (4+1, 4+1) RAID 5 1 (10+1) Best Practices Yes Yes For selected configurations Not for business-critical data PS Series Group Operations 129
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