Administrator Guide

NFS Write To Read-Only NAS Volume
Description A client tries to modify a file on a read-only NAS volume.
Cause A NAS volume is set to read-only when it is the target of a replication.
The most frequent reason for this event is either:
• The client meant to access the target system for read purposes, but also tries to modify a file by mistake.
• The client accesses the wrong system due to similarity in name/IP address.
• The client is accessing a NAS volume that was made a replication target without the client’s knowledge.
Workaround
• Refer the client to the correct NAS volume.
• In order to write to the NAS volume, replication must be terminated first so the NAS volume becomes
standalone.
NFS Write to Snapshot
Description An NFS client tries to modify a file located in a snapshot.
Cause NAS volume snapshots cannot be modified by design.
Workaround Inform the client that snapshot data cannot be modified. A snapshot is an exact representation of the NAS
volume data at the time of its creation.
Troubleshoot NAS File Access and Permissions Issues
This section contains probable causes of and solutions to common NAS file access and permissions problems.
Cannot Change the Ownership of a File or a Folder
Description
Every file on the FluidFS cluster 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
A user or an application cannot modify a file.
Cause
• 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 and is read-only.
Workaround
1. 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.
2. If the problem is related to a specific NAS volume, verify there is enough free space on the NAS volume
or expand it, and verify that the accessed NAS volume is not a target of a replication.
Mixed File Ownership Denied
Description
Both the file owner and group owner must be from the same identity type (UNIX vs. NTFS). An attempt to
set different identity types was detected.
Cause It is impossible to change only the file owner ID to UID if the original file ownership is SID/GSID.
Workaround To change the file ownership to UNIX style ownership, set UID and GID at same time.
FluidFS Administration 465