ONTAP 9.14

to Japanese version

Decide which aggregate creation method to use

Although aggregate creation with auto-provision is a best practice in ONTAP 9.7 and later, you must determine whether it is supported in your environment. If it is not, you must make decisions about RAID policy and disk configuration, and then create the aggregates manually.

When a local tier is created automatically, ONTAP analyzes available spare disks in the cluster and generates a recommendation about how spare disks should be used to add local tiers according to best practices. ONTAP displays the recommended configurations. You can accept the recommendations or add the local tiers manually.

Before you can accept ONTAP recommendations

If any of the following disk conditions are present, they must be addressed before accepting the recommendations from ONTAP:

  • Missing disks

  • Fluctuation in spare disk numbers

  • Unassigned disks

  • Non-zeroed spares

  • Disks undergoing maintenance testing

The storage aggregate auto-provision man page contains more information about these requirements.

When you must use the manual method

In many cases, the recommended layout of the local tier will be optimal for your environment. However, if your environment includes the following configurations, you must create the local tier using the manual method.

Beginning with ONTAP 9.11.1, you can manually add local tiers with ONTAP System Manager.
  • MetroCluster system

  • SyncMirror

  • FlashPool tiers (aggregates)

  • Multiple disk types or sizes are connected to the node

Select the method to create local tiers (aggregates)

Top of Page