bioctl(8) on OpenBSD
The text a6cfd9091669, as OpenBSD 5.0, OpenBSD 4.9 shipped it.
RAID management interface
Flags it lists
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-C -
-H -
-P -
-a -
-b -
-c -
-d -
-h -
-i -
-k -
-l -
-p -
-q -
-r -
-s -
-u -
-v