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NFS Version 4 - System i Client Requires NFS BIO Server Daemon



This document provides information about System i NFS client running 6.1 or greater requiring the NFS BIO daemon.

Resolving The Problem

The IBM System i Network File System (NFS) application was enhanced at Release 6.1 to use NFS Version 4 using TCP/IP.
Important Note: This enhancement requires the current NFS PTFs.

When the System i functions as a NFS client and NFS version 4 is required, the System i requires the NFS BIO and RGY server daemons to be running. This is different than previous releases of System i NFS client where no server daemons were required. If the NFS BIO and/or RGY daemon is inactive, it can be started using the following command:


If the BIO daemon is not active, and the MOUNT command is run, it will fail with any of the following errors:

CPFA0E3 - The requested operation could not be completed.
CPFA0A2 - Information passed to this operation was not valid.
CPFA0AA - Error occurred while attempting to obtain space
CPFA0D4 - File system error occurred. Error number 3438

[{"Product":{"code":"SWG60","label":"IBM i"},"Business Unit":{"code":"BU009","label":"Systems - Cognitive"},"Component":"Communications-TCP","Platform":[{"code":"PF012","label":"IBM i"}],"Version":"7.2.0;7.1.0;6.1.1;6.1.0;6.1","Edition":""},{"Product":{"code":"SSC5L9","label":"IBM i 7.2"},"Business Unit":{"code":"BU009","label":"Systems - Server"},"Component":" ","Platform":[{"code":"","label":null}],"Version":"","Edition":""},{"Product":{"code":"SSC52E","label":"IBM i 7.1"},"Business Unit":{"code":"BU009","label":"Systems - Server"},"Component":" ","Platform":[{"code":"","label":null}],"Version":"","Edition":""},{"Product":{"code":"SSC3X7","label":"IBM i 6.1"},"Business Unit":{"code":"BU009","label":"Systems - Server"},"Component":" ","Platform":[{"code":"","label":null}],"Version":"","Edition":""}]

Historical Number


Document Information

Modified date:
18 December 2019