Scenario:

You can manually change the WORM protection period of a file on the client as needed. In this way, when the file enters the protected status, its protection period is no longer the default protection period of the root WORM directory set on EDS. If the protection period of a file expires but is within the maximum protection period specified on EDS, you can manually extend the protection period to set the file in protected status again. For details about the maximum protection period, see 5.3.3 File Expiration Time Calculation.

Procedure on Linux Clients:

On the Linux client, mount the NFS directory whose WORM protection is enabled, and run the command touch -a -t time file to change atime of the file based on the protection period settings on EDS.

atime and modification time (mtime) on Linux:

atime: Indicates the time when data in the file was last accessed.

mtime: Indicates the time when the file content was last modified.

You can run the command stat file name to check atime and mtime.

Procedure on Windows Clients:

You cannot change the protection period on Windows clients directly. However, you can change the protection period of a CIFS share on a Linux client through NFS. For details, see Procedure on Linux Clients.

Precautions:

atime cannot be changed on the client for a file in manual lockout status but can be changed for a file in auto lockout status.
If a file is already in the protected status, you can only change atime after the protection period expires.
When you change atime, pay attention to the number of days in each month. Incorrect date format may cause the failure of atime change.

Procedure (Linux):

Configure WORM protection on EDS. For details, see the procedure for common scenarios.
On the Linux client, connect to the directory for which WORM protection is enabled and create a file.
Check the time in the WORM clock on EDS and determine whether the file is in the protected status. If the file is in the protected status, you can only change atime after the protection period expires. The changed atime determines the new expiration time of the protection period. For details, see 5.3.3 File Expiration Time Calculation. For example, the default WORM protection period is one year, the minimum protection period is four months, and the auto lockout period is one minute. If you want to shorten the protection period to five months, you can change atime to a time five months after the WORM clock time.

Reference atime change command:

Log in to EDS, go to Resources > File Storage > File Resources and select a file system to check the expiration time of the file.

Procedure (Windows):

Configure WORM protection on EDS. For details, see the procedure for common scenarios.
On the Windows client, connect to an EDS shared directory (such as the file system directory Wormtest1) with WORM protection enabled, and create a test file, such as 321.txt.
Add the shared CIFS directory in step 2 to an NFS share, grant the read and write permissions, and mount the NFS share to the Linux client.

On the Linux client, create a user that is granted the same permissions as the user created for the CIFS share on EDS, and switch to the new user.

Check the WORM clock time on EDS and determine whether the file is in the protected status. If the file is in the protected status, you can only change atime after the protection period expires. The changed atime determines the new expiration time of the protection period. For details, see 5.3.3 File Expiration Time Calculation.

Check the expiration time of the file.

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Changing Protection Expiration Time by Modifying Configuration on Clients