PowerStore File-Level Retention (FLR)

In PowerStoreOS 3.0 and later, users can enable File Level Retention (FLR) on General type file systems.

FLR is used to prevent modification or deletion of locked files until a specified retention date. Also known as Write Once, Read Many (WORM).

PowerStore supports both FLR-Enterprise (FLR-E) and FLR-Compliance (FLR-C).

FLR Enterprise (FLR-E)

• Prevents file modification and deletion by users through SMB, NFS, and FTP
• Does not prevent file system (FS) deletion by storage administrators if FS has locked files

FLR Compliance (FLR-C)

• Prevents file modification and deletion by users through SMB, NFS, and FTP
• Prevents FS deletion by storage administrators if FS has locked files
• FLR-C includes a data integrity check as required by SEC rule 17a-4(f). When data is written, it is read back by the storage system to ensure that it has not changed during the write process. The write verification functionality is disabled by default. It can be enabled by changing the NAS server param FLRCompliance.writeverify from 0 to 1.

The FLR mode is set when creating a General file system and cannot be changed afterward.

Available for general file systems only.

The available FLR modes are Off (default), Enterprise, and Compliance.

FLR settings available on an FLR-enabled file system.

For more information about file system types and File Level Retention, review the Dell PowerStore: File Capabilities white paper.

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