Once you mount your NFS location in a data disk, you have access to the following capabilities:

Flat file support. You can use flat files from the mounted NFS location in your mappings.
Parameter file support. You can use parameter files stored in the mounted NFS location. This simplifies migrating jobs from a Secure Agent group to a serverless runtime environment, since you don't need to modify your mappings.

When using existing NFS directories as data disks in an Azure serverless runtime environment, ensure that the user with ID=501 has permissions to read and write from the mount directory of the NFS storage. User ID 501 is the

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user, which the Azure serverless runtime environment uses to access mounted NFS directories.

If user 501 doesn't exist, create that user and assign the appropriate permissions.