User Guide

More file system features
This chapter contains the following information:
Topics:
• File-level retention
• File system quotas
File-level retention
File-level retention (FLR) enables you to prevent modifications or deletion of locked for a specified retention period. Protecting
a file system using FLR enables you to create a permanent, and unalterable set of files and directories. FLR ensures data
integrity and accessibility, simplifies archiving procedures for administrators and improves storage management flexibility.
There are two levels of file-level retention:
● Enterprise (FLR-E) - Protects data from changes that are made by users and storage administrators using SMB, NFS, and
FTP. An administrator can delete an FLR-E file system which includes locked files.
● Compliance (FLR-C) - Protects data from changes that are made by users and storage administrators using SMB, NFS,
and FTP. An administrator cannot delete an FLR-C file system which includes locked files. FLR-C complies with SEC rule
17a-4(f).
The following restrictions apply:
● File-level retention is available on unified PowerStore system 3.0 or later.
● FLR is not supported in VMware file systems.
● Enabling a file-level retention for a file system and the level of FLR are set at file system creation time and cannot be
modified.
● FLR-C does not support restoring from a snapshot.
● When refreshing using a snapshot, both file systems must be of the same FLR level.
● When replicating a file system, source and destination file systems must be of the same FLR level.
● A cloned file system has the same FLR level as the source (cannot be modified).
The FLR mode is displayed in the File Systems screen.
Configure DHSM server
Prerequisites
File-level retention requires DHSM server credentials.
DHSM server is also required for Window hosts that want to use FLR and are required to install FLR toolkit that enables
managing FLR-enabled file systems.
Steps
1. Select Storage > NAS Servers > [NAS server] > Protection > DHSM.
2. If disabled, slide the button to Enabled.
3. Enter the user name and password for the DHSM server and verify the password.
4. Select Apply.
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More file system features 21