You must create a new volume in one of the following ways:

Setting the volume -language option explicitly:

Inheriting the volume -language option from an SVM that has been created with or modified for the option:

If you are using ONTAP 9.7, you cannot modify existing volumes for utf8mb4 support; you must create a new utf8mb4-ready volume, and then migrate the data using client-based copy tools.

Unicode character data is typically represented in Windows file systems applications using the 16-bit Unicode Transformation Format (UTF-16) and in NFS file systems using the 8-bit Unicode Transformation Format (UTF-8).

You can use either the volume qtree command family or ONTAP System Manager to set or modify qtree names.

qtree names can include multi-byte characters in Unicode format, such as Japanese and Chinese characters.

In 9.7 and later releases, 4-byte characters are supported in qtree names, provided that the qtree is in a volume enabled for utf8mb4.