+\fB\-o \fR\fB\fIconfigoption\fR\fR
+.RS 4
+See the "CONFIGURATION OVERRIDE" section in
+\fBamanda\fR(8)\&.
+.RE
+.PP
+If a configuration is specified, it is loaded and used to configure the device\&. Note that global configuration parameters are not applied to the device, so if you need to apply properties to a device to run amtapetype, you should supply those properties in a named
+\fIdevice\fR
+section\&.
+.SH "EXAMPLE"
+.PP
+Generate a tapetype definition for your tape device:
+.sp
+.if n \{\
+.RS 4
+.\}
+.nf
+% amtapetype \-f /dev/nst0
+.fi
+.if n \{\
+.RE
+.\}
+.SH "NOTES"
+.PP
+If the device cannot reliably report its comprssion status (and as of this writing, no devices can do so), hardware compression is detected by measuring the writing speed difference of the tape drive when writing an amount of compressable and uncompresseable data\&. If your tape drive has very large buffers or is very fast, the program could fail to detect hardware compression status reliably\&.
+.PP
+Volume capacity is determined by writing one large file until an error, interpereted as end\-of\-tape, is encountered\&. In the next phase, about 100 files are written to fill the tape\&. This second phase will write less data, because each filemark consumes some tape\&. With a little arithmetic,