gsched(8): fix example usage, mdoc nits

- ad0 was referred to as da0
- wrong parameter -s instead of -a in example
- use double quotes consistently

PR:            docs/150082
Submitted by:  N.J. Mann <njm@njm.me.uk>
MFC after:     2 weeks

1 files changed, 7 insertions, 7 deletions

diff --git a/sbin/geom/class/sched/gsched.8 b/sbin/geom/class/sched/gsched.8
index caa8417..7e6b113 100644
--- a/sbin/geom/class/sched/gsched.8
+++ b/sbin/geom/class/sched/gsched.8
@@ -25,7 +25,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd April 12, 2010
+.Dd August 29, 2010
 .Dt GSCHED 8
 .Os
 .Sh NAME
@@ -92,7 +92,7 @@ which in turn forwards requests to the existing geom.
 This operation allows one to start/stop a scheduling service
 on an already existing provider.
 .Pp
-A subsequent 'destroy' will remove the newly created geom and
+A subsequent "destroy" will remove the newly created geom and
 hook the provider back to the original geom.
 .It Cm configure
 Configure existing scheduling provider.  It supports the same options
@@ -135,16 +135,16 @@ maximum amount of debug information is printed.
 Exit status is 0 on success, and 1 if the command fails.
 .Sh EXAMPLES
 The following example shows how to create a scheduling provider for disk
-.Pa /dev/da0
-, and how to destroy it.
+.Pa /dev/ad0 ,
+and how to destroy it.
 .Bd -literal -offset indent
 # Load the geom_sched module:
 kldload geom_sched
 # Load some scheduler classes used by geom_sched:
 kldload gsched_rr gsched_as
-# Configure device ad0 to use scheduler 'rr':
-geom sched insert -s rr ad0
-# Now provider ad0 uses the 'rr' algorithm;
+# Configure device ad0 to use scheduler "rr":
+geom sched insert -a rr ad0
+# Now provider ad0 uses the "rr" algorithm;
 # the new geom is ad0.sched.
 # Remove the scheduler on the device:
 geom sched destroy -v ad0.sched.