Enable Xsan extended attributes in macOS Server
Extended attributes are enabled when you create a volume, unless you deliberately disable them.
If extended attributes were disabled on a SAN volume when it was created, and all computers that use the volume are Mac computers, you can enable extended attributes for the files on the volume.
When extended attributes are enabled, attributes associated with a file are stored inside the file itself, rather than in separate hidden files. Enabling extended attributes improves file system performance.
Important: You can only enable extended attributes when you create a volume. Additionally, you can’t disable extended attributes. Enabling them on a volume is a one-way process that can’t be undone.
WARNING: To avoid data loss, clients with Quantum’s StorNext File System (Windows, AIX, IRIX, Linux, and Solaris computers) must not access volumes that use extended attributes.
When creating a volume, select "Use native extended attributes,” then click OK.
After you click OK, the volume is unmounted from all SAN computers, then remounted.