Skip to main content

Convert from ONTAP RAID-DP to RAID-TEC

Contributors netapp-aaron-holt netapp-mwallis netapp-thomi netapp-dbagwell netapp-aherbin netapp-sumathi netapp-lenida
PDFs

If you want the added protection of triple-parity, you can convert from RAID-DP to RAID-TEC. RAID-TEC is recommended if the size of the disks used in your local tier is greater than 4 TiB.

Note Prior to ONTAP 9.7, System Manager uses the term aggregate to describe a local tier. Regardless of your ONTAP version, the ONTAP CLI uses the term aggregate. To learn more about local tiers, see Disks and local tiers.
Before you begin

The local tier that is to be converted must have a minimum of seven disks.

About this task

  • Hard disk drive (HDD) local tiers can be converted from RAID-DP to RAID-TEC. This includes HDD tiers in Flash Pool local tiers.

Process for flashpools/hybrid aggregates where -disktype needs to be used to change each disk type

[-T, -disktype {ATA | BSAS | FCAL | FSAS | LUN | MSATA | SAS | SSD | VMDISK | SSD-NVM | SSD-CAP | SSD-ZNS | VMLUN | VMLUN-SSD}] - Disk Type

This parameter specifies the disk type of the RAID groups to be modified. In case of Flash Pool, it specifies either the HDD tier or the SSD tier. If the HDD tier is composed of more than one type of disk, specifying any of the disk types in use causes that tier to be modified. If the current aggregate RAID type is mixed_raid_type, this parameter is mandatory.

Steps

  1. Verify that the local tier is online and has a minimum of six disks:

    storage aggregate show-status -aggregate aggregate_name

  2. Convert the local tier from RAID-DP to RAID-TEC:

    storage aggregate modify -aggregate aggregate_name -raidtype raid_tec

  3. Verify that the local tier RAID policy is RAID-TEC:

    storage aggregate show aggregate_name

Related information