NETAPP ONTAP 9 RAID TEC CONFIGURATION

For protecting data, NetApp's Ontap 9 introduces RAID-TEC, or triple erasure coding. With RAID-TEC, up to three spinning disks or SSDs can be lost without impacting capacity or performance.

This new RAID format is designed for triple parity protection for the larger SATA and SSD disk sizes. This will essentially allow for much larger RAID Group sizes on the large disks.

RAID-TEC will be the default going forward on any drives 6TB and larger and required for drives 10TB and larger. You will be able to convert existing RAID-DP aggregates non-disruptively to RAID-TEC groups as well.

To list aggregates in CLI.

To list the detailed information about the particular aggregate.

List the aggregate status in System Manager GUI.

To create a new aggregate in CLI select with particular disk types and the raid type.

If you are not specifying raid type, default one is RAID_DP.

To change the status of an aggregate like online, offline and restrict.

To check the aggregate space information.

To increase the capacity of an existing aggregate.

You can increase the capacity of an aggregate but you will not decrease the size.

64-bit aggregate can grow up to 100TB.

you can create 100 Aggregates in a Node.

To check the size of an aggregate.

Create an aggregate using system manager GUI.

Select RAID levels (RAID4, RAID_DP and RAID_TEC).

New aggregate created with RAID_TEC which supports three disks failure.

You see the RAID_TEC which contains the three parity disks.

You can change the raid levels from raid4 to raid_Dp.

To delete an existing aggregate.

The storage aggregate scrub command scrubs an aggregate for media and parity errors. Parity scrubbing compares the data disks to the parity disks in their RAID group and corrects the parity disks contents, as required. If no name is given, parity scrubbing is started on all online aggregates.By default, scrubs are scheduled to run for a specified time on a weekly basis. However, you can use this command to run scrubs manually to check for errors and data inconsistencies.

You can check the scrub status also.