Powervault validation when linear storage is chosen

Signed-off-by: Shubhangi-dell <shubhangi_srivastava@dell.com>

control_plane/roles/powervault_me4/tasks/pv_validation.yml

@@ -71,21 +71,28 @@
       - vol_count2.stdout == "0"
       - powervault_me4_slurm_volume_name | length < 30
     msg: "{{ system_name_wrong }}"
+    
+- name: Assert disk group name given if pool type is linear
+  assert:
+    that:
+      - powervault_me4_disk_group_name| length > 1
+    msg: "{{ system_name_wrong }}"
+  when:  powervault_me4_pool_type | lower == "linear"
 
-- name: Check if disk name has space
+- name: Check if disk group name has space
   shell: echo {{ powervault_me4_disk_group_name }} | grep '\s' -c
   register: disk_count
   when: powervault_me4_disk_group_name | length > 1
   ignore_errors: true
   tags: install
 
-- name: Assert if disk name has space
+- name: Assert if disk group name has space
   assert:
     that:
       - disk_count.stdout == "0"
-      - powervault_me4_disk_group_name | length > 1
       - powervault_me4_disk_group_name | length < 30
     msg: "{{ system_name_wrong }}" 
+  when: powervault_me4_disk_group_name | length > 1
 
 - name: Assert snmp notification level
   assert:
@@ -117,7 +124,7 @@
     that: 
       - powervault_me4_pool == "a" or powervault_me4_pool == "A" or powervault_me4_pool == "b" or powervault_me4_pool == "B"
     msg: "{{ wrong_pool }}"
-  when: powervault_me4_pool_type == "virtual"
+  when: powervault_me4_pool_type | lower == "virtual"
 
 - name: Check pool type
   assert:
@@ -145,4 +152,4 @@
 - name: Assert the nic provided
   assert:
     that:
-      - powervault_me4_server_nic | length > 2
+      - powervault_me4_server_nic | length > 2