--f::::
-Print full superblock information.
-+
-Including the system chunk array and backup roots.
-+
--a::::
-Print information of all superblocks.
+-f|--full::::
+print full superblock information, including the system chunk array and backup roots
+-a|--all::::
+print information about all present superblock copies (cannot be used together
+with '-s' option)
+-i <super>::::
+(deprecated since 4.8, same behaviour as '--super')
+--bytenr <bytenr>::::
+specify offset to a superblock in a non-standard location at 'bytenr', useful
+for debugging (disables the '-f' option)