Changing the RAID type of RAID groups in a Flash Pool aggregate

The SSD cache of a Flash Pool aggregate can have a different RAID type than the HDD RAID groups if you need to reduce the parity overhead for your SSD RAID groups.

Before you begin

You should understand the considerations for RAID type and spare management for Flash Pool cache.
If you are changing the RAID type of the SSD cache from RAID-DP to RAID4, you should ensure that doing so will not cause you to exceed your cache size limit.

About this task

If the SSD cache has a different RAID type than the HDD RAID groups, the Flash Pool aggregate is considered to have a mixed RAID type, displayed as mixed_raid_type for the aggregate. In this case, the RAID type is also displayed for each RAID group.

All HDD RAID groups in a Flash Pool aggregate must have the same RAID type, which should be RAID-DP.

Steps

Change the RAID type of the SSD cache or HDD RAID groups of the Flash Pool aggregate: aggr options aggr_name -T disk-type
To change the RAID type of the SSD cache, use -T SSD. To change the RAID type of the HDD RAID groups, specify any disk type included in the HDD RAID groups.
Verify the RAID groups in your Flash Pool aggregate: aggr status aggr_name -r
You also can use the aggr status -r command to obtain more details about the RAID types of the HDD RAID groups and SSD cache of the Flash Pool aggregate.