Display version information and exit.
.TP
.BI \-\-terse\-version \fR=\fPversion
-Set terse version output format (Current version 3, or older version 2).
+Set terse version output format (default 3, or 2 or 4)
.TP
.B \-\-help
Display usage information and exit.
bs=8k,32k means 8k for reads, 32k for writes and trims
bs=8k,32k, means 8k for reads, 32k for writes, and default for trims
bs=,8k means default for reads, 8k for writes and trims
-bs=,8k, means default for reads, 8k for writes, and default for writes
+bs=,8k, means default for reads, 8k for writes, and default for trims
.fi
.TP
.BI blocksize_range \fR=\fPirange[,irange][,irange] "\fR,\fB bsrange" \fR=\fPirange[,irange][,irange]