dump(8) on FreeBSD
The text 20ab33298c09, as FreeBSD 4.6.2-RELEASE, FreeBSD 4.6-RELEASE shipped it.
filesystem backup
Flags it lists
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-0-9 -
-B -
-D -
-T -
-W -
-a -
-b -
-c -
-d -
-f -
-h -
-k -
-n -
-s -
-u -
-w