Dell Unity: NFSv4 fails to mount to export path, NFSv3 succeeds. (User Correctable)

Summary: The article describes one of the reasons why the mount fails with "No such file or directory" when trying to mount with NFSv4.

This article applies to This article does not apply to This article is not tied to any specific product. Not all product versions are identified in this article.
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Symptoms

NFSv4 mount with export path failed when the share name contains the "/" character. 
mount -o vers=4 xx.xx.xx.xx:/<share name contains "/"> /mnt/nfsv4
mount.nfs: mounting xx.xx.xx.xx:/<share name contains "/"> failed, reason given by server: No such file or directory
Attempting to mount with NFSv3 to the same Export Path is successful.

Cause

NFSv4 client cannot mount a share name that contains the "/" character.

The Unisphere CLI documentation states the following:
An NFSv4 client cannot mount a share using a name that contains the "/" character.
Instead the client must use the share path.

Resolution

If the above condition is met, use share path (local path) instead of share name (export path) for mounting.

Additional Information

The following is an example where the NFS Share Name contains "/".
This is an example of the Unisphere UI screen with
In this example, if there is a folder named "/AAA/CCC" under the file system, the folder is mounted when attempting to mount it using NFSv4.
If there is no folder "/AAA/CCC" under the file system, a "No such file or directory" error appears.

Mount with "Export paths" using NFS version 3 
# mount -o vers=3 xx.xx.xx.xx:/AAA/CCC /mnt/nfsv3
Mount with "Export paths" using NFS version 4 
# mount -o vers=4 xx.xx.xx.xx:/AAA/CCC /mnt/nfsv4
mount.nfs: mounting xx.xx.xx.xx:/AAA/CCC failed, reason given by server: No such file or directory
Mount with "Local path" using NFS version 4 
# mount -o vers=4 xx.xx.xx.xx:/testfs/AAA/BBB/CCC /mnt/nfsv4

Affected Products

Dell EMC Unity, Dell Unity 450F DC, Dell Unity 300, Dell Unity 300 DC, Dell EMC Unity 300F, Dell EMC Unity 350F, Dell Unity 350F DC, Dell EMC Unity XT 380, Dell EMC Unity XT 380F, Dell EMC Unity 400, Dell Unity 400 DC, Dell EMC Unity 400F , Dell EMC Unity 450F, Dell EMC Unity XT 480, Dell EMC Unity XT 480F, Dell EMC Unity 500, Dell EMC Unity 500F, Dell EMC Unity 550F, Dell EMC Unity 600, Dell EMC Unity 600F, Dell EMC Unity 650F, Dell EMC Unity XT 680, Dell EMC Unity XT 680F, Dell EMC Unity XT 880, Dell EMC Unity XT 880F, Dell EMC Unity Family |Dell EMC Unity All Flash, Dell EMC Unity Family, Dell EMC Unity Hybrid, Dell EMC UnityVSA Professional Edition/Unity Cloud Edition ...
Article Properties
Article Number: 000224159
Article Type: Solution
Last Modified: 06 Aug 2025
Version:  2
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