+.B \-l
+Lookup the device that matches the search parameter specified using
+the
+.B \-t
+option, assuming that there is only one matching the search parameter.
+For a system with a large number of disks, this will be more
+efficient by avoiding the need to revalidate devices unless absolutely
+necessary. If this option is not specified,
+.B blkid
+will use a less efficient approach, which allows
+.B blkid
+to print all of the devices that match the search parameter.
+.IP
+This option is best used for tag searches such as
+.I LABEL=data_vol
+or
+.IR UUID=e280469a-d06f-4c0b-b068-44f3b576029e .
+If you want
+.B blkid
+to print all of the ext3 filesystems using a search parameter
+such as
+.IR TYPE=ext3 ,
+then this option should
+.I not
+be used.
+.TP