When you change an aggregate's RAID level from RAID-DP to RAID4, the extra parity disks are converted to spares. In addition, the raidsize option is changed.
- Change the RAID level: aggr options aggr_name raidtype raid4
When you change the RAID level of an aggregate from RAID-DP to RAID4, Data ONTAP makes the following changes:
- In each of the aggregate’s existing RAID groups, the second parity disk (dParity) is removed and designated as a hot spare, thus reducing each RAID group’s size by one parity disk.
- The setting for the aggregate’s raidsize option is changed to the size of the largest RAID group in the aggregate, except in the following situations:
- If the aggregate’s largest RAID group is larger than the maximum RAID4 group size, then the aggregate’s raidsize option is set to the maximum.
- If the aggregate’s largest RAID group is smaller than the default RAID4 group size, then the aggregate’s raidsize option is set to the default group size.
- If the aggregate's raidsize option is already below the default value for RAID4, it is reduced by 1.
After you finish
You can verify the new RAID level by using the aggr options command.