Administrator Guide

Table Of Contents
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 conguration to open the Modify RAID Conguration 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 Supported Conversion
RAID 10 All
RAID 50 RAID 5, RAID 6
RAID 5 None
RAID 6 None
RAID 6 Accelerated None
RAID Sets
The tables below show a logical drive layout when an array is initialized for the rst 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 rmware.
Table 25. 12–Drive Conguration shows the RAID set relationship for each RAID type in a 12-drive conguration.
Table 25. 12–Drive
Conguration
RAID Policy Spare Disks RAID Set Relationship Best Practices
RAID 6 1 (9+2) Yes
RAID 10 2 (5+5) Yes
RAID 50 2 (4+1, 4+1) For selected congurations
RAID 5 1 (10+1) Not for business-critical data
PS Series Group Operations
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