NFS Write To Snapshot, Cannot Modify NAS Files

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.

NFS Access Denied To A File Or Directory

Description	User cannot access the NFS file or directory even though the user belongs to the
	group owning the NFS object and the group members are permitted to perform the
	operation.
Cause	NFS servers (versions 2 and 3) use the Remote Procedure Call (RPC) protocol for
	authentication of NFS clients. Most RPC clients have a limitation of up to 16 groups
	passed to the NFS server. If a user belongs to more than 16 UNIX groups, as supported
	by some UNIX flavors, some of the groups are not passed and are not checked by the
	NFS server and thus the user's access may be denied.
Workaround	A possible way to verify this problem is to use newgrp to temporarily change the
	primary group of the user and thus ensure it is passed to the server.
	The simple workaround, although not always feasible, is to remove the user from
	unnecessary groups, leaving only 16 groups or less.

Troubleshooting NAS File Access And Permissions Issues

Cannot Change The Ownership Of A File Or A Folder

Description	Every file on the NAS system is owned by either a
	UNIX or NTFS user. Inability to change ownership is
	treated differently, depending on whether the
	access is native or non-native.
Cause	The user is not authorized to perform the
	ownership change.
Workaround	An authorized user must perform this action.

Cannot Modify NAS Files

Description

Cause

Workaround

A user or an application cannot modify a file.

•The client cannot modify a file due to lack of permissions on the file.

•The NAS volume has reached full capacity and the file system denies any write requests, including overwrites.

•The NAS volume is a target in a replication relationship and is read only.

•If the problem appears only on some files, this is a permission issue. Verify that the user account has modify permissions on the file or use a different user account.

•If the problem is related to a specific NAS volume:

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Dell NX3600, NX3500 Troubleshooting NAS File Access And Permissions Issues, NFS Write To Snapshot

Models: NX3500 NX3600 NX3610