mount_mfs(8) on FreeBSD
The text fd31bf7d0730, as FreeBSD 4.4-RELEASE shipped it.
construct a new file system
Flags it lists
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-F -
-N -
-O -
-S -
-T -
-U -
-a -
-b -
-c -
-d -
-e -
-f -
-o -
-r -
-s -
-t -
-u -
-v