If you are maintaining a legacy NetApp array, keeping a copy of the OCSM 3.1.3 installer in your internal IT archives is a best practice. As NetApp continues to purge old downloads from public mirrors, this version will become harder to find.
The directory listing was a time capsule: filer_view_7.3/, dfm_5.2/, system_manager_3.1.3/.
Finding legacy software links can be difficult as vendors update their support portals. Here is the standard procedure to locate the installer.
Warning: Downloading NetApp proprietary software from third-party torrent sites is a violation of licensing agreements and poses a significant security risk (malware, backdoored binaries).
Check the box accepting the terms. Click the Download button. The file size is approximately 350–400 MB.