This parameter controls the maximum size of extended attributes that may be written to the server as EAs or as alternate data streams if vfs_streams_xattr is enabled. The maximum size of extended attributes depends on the Samba server's operating system and the underlying filesystem. The Linux VFS currently sets an upper boundary of 64 KiB per extended attribute. FreeBSD does not set a practical upper limit, but since pread() and pwrite() are not possible via the extattr on FreeBSD, it is not recommended to increase this value above a few MiB. If a client attempts to write an overly-large alternate datastream, the Samba server will return STATUS_FILESYSTEM_LIMITATION. If this error is encountered, users may try increasing the maximum size supported for xattr writes. If this is not possible, and writes are from a MacOS client and to an AFP_Resource extended attribute, the user may enable the vfs_fruit module and configure to allow stream writes for AFP_Resource to an alternative storage location. See vfs_fruit documentation for further details. 65536