resolve review comments.

Signed-off-by: Shovan Maity <shovan.cse91@gmail.com>

disk.yaml → samples/custom-disk.yaml

@@ -1,7 +1,7 @@
 apiVersion: openebs.io/v1alpha1
 kind: Disk
 metadata:
-  name: disk-123345 #<name of disk> #should be unique like disk-random-unique-name
+  name: unique-disk-name #<name of disk> #should be unique like disk-random-unique-name
   labels:
     kubernetes.io/hostname: minikube #<host name in which disk/device is attached> # like gke-openebs-user-default-pool-044afcb8-bmc0
     ndm.io/managed: "false" # for manual disk creation put true
@@ -11,5 +11,5 @@ status:
 spec:
   capacity:
     logicalSectorSize: 512 #<logical sector size of disk> # like 512
-    storage: 1024 #<total capacity in bits> #like 53687091200
-  path: /dev/sda#<devpath> # like /dev/sdb
+    storage: 1073741824 #<total capacity in bits> #like 53687091200
+  path: /dev/sda7 #<devpath> # like /dev/sdb