just want to read the image or write access if you want to modify the
image).
-This is equivalent to the qemu parameter C<-drive file=filename>.
+This is equivalent to the qemu parameter C<-drive file=filename,cache=off>.
Note that this call checks for the existence of C<filename>. This
stops you from specifying other types of drive which are supported
Remove the single directory C<path>.
+=item $h->scrub_device ($device);
+
+This command writes patterns over C<device> to make data retrieval
+more difficult.
+
+It is an interface to the L<scrub(1)> program. See that
+manual page for more details.
+
+B<This command is dangerous. Without careful use you
+can easily destroy all your data>.
+
+=item $h->scrub_file ($file);
+
+This command writes patterns over a file to make data retrieval
+more difficult.
+
+The file is I<removed> after scrubbing.
+
+It is an interface to the L<scrub(1)> program. See that
+manual page for more details.
+
+=item $h->scrub_freespace ($dir);
+
+This command creates the directory C<dir> and then fills it
+with files until the filesystem is full, and scrubs the files
+as for C<$h-E<gt>scrub_file>, and deletes them.
+The intention is to scrub any free space on the partition
+containing C<dir>.
+
+It is an interface to the L<scrub(1)> program. See that
+manual page for more details.
+
=item $h->set_append ($append);
This function is used to add additional options to the
to securely wipe the device). It should be sufficient to remove
any partition tables, filesystem superblocks and so on.
+See also: C<$h-E<gt>scrub_device>.
+
=item $h->zerofree ($device);
This runs the I<zerofree> program on C<device>. This program