Nfs owner restricted operation, Nfs write to read-only export, Nfs write to read-only volume – Dell PowerVault NX3600 User Manual
Page 80: Nfs write to snapshot

c. Remove the export and communicate this to
the client.
3. List all available exports on the NAS and identify the
problematic export. It must have an indication that it
is not accessible.
4. Delete the export or create the directory where the
export points to.
NFS Owner Restricted Operation
Description
NFS client is not permitted to perform the requested
action to the specific file.
Cause
NFS user attempted a chmod or chgrp operation while
not being the owner of the file.
Workaround
This is a minor, user-level issue. Frequent events of this
type may indicate a malicious attempt to access restricted
data.
NFS Write To Read-Only Export
Description
NFS client tries to perform modifications on a read-only
export.
Cause
An NFS export can be defined as a read-only export. A
client accessing a read-only export cannot perform write
operations or modify included files.
Workaround
This event, by itself, does not require any administrative
intervention.
NFS Write To Read-Only Volume
Description
An NFS user tries to modify a file on a read-only volume.
Cause
A NAS volume becomes read-only when it is set as the
target in a replication relation. Modifying a read-only
volume is inhibited, until the replication relation is
removed and the volume returns to a simple, normal state.
Workaround
Inform the user(s) of the state of the NAS volume.
NFS Write To Snapshot
Description
An NFS user tries to modify a file located in a snapshot.
Cause
NAS volume snapshots cannot be modified by design.
Workaround
Snapshot data cannot be modified. A snapshot is an exact
representation of the NAS volume data at the time of its
creation.
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