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.TP
.BI \--reformat
-Reformat an existing Lustre disk
+Reformat an existing Lustre disk as a new target
+.TP
+.BI \--replace
+Used to initialize a target with the same
+.I --index
+as a previously used target if the old target was permanently lost for
+some reason (e.g. multiple disk failure or massive corruption). This
+avoids having the target try to register as a new target with the MGS.
.TP
.BI \--stripe-count-hint= stripes
Used for optizing MDT inode size