# Dell EMC PowerVault Storage  

## Update the input parameters 
Under the `control_plane/input_params` directory, edit the following files:
1. `base_vars.yml` file: Update the following variable to enable or disable PowerVault Storage configurations in the cluster.  

	Variable	|	Default, choices	|	Description
	-------	|	----------------	|	-----------------
	powervault_support	|	<ul><li>**false**</li><li>true</li></ul>	|	Set the variable to "true" to enable PowerVault Storage configurations.  

2. `login_vars.yml` file:  Enter the following details to configure PowerVault Storage devices.  
	a. `powervault_me4_username`- username for PowerVault Storage devices.  
	**NOTE**: The username must not contain the following characters: -, \\, "", and \'  
	b. `powervault_me4_password`- password for PowerVault Storage devices.   
	**NOTE**: Minimum length of the password must be eight characters and the maximum limit is 30 characters. The password must contain at least one uppercase, lowercase, numeric, and non-alphanumeric character. Do not use these characters while entering a password: -, \., \,, \<, \\, "", and \'  

3. `powervault_me4_vars` file: If **powervault_support** is set to "true" in the *base_vars.yml* file, then update the following variables.

	Variables	|	Default, choices	|	Description
	----------------	|	-----------------	|	-----------------
	locale	|	<ul><li>English</li></ul>	|	Represents the selected language. Currently, only English is supported.
	powervault_me4_system_name [Optional]	|	<ul><li>**Uninitialized_Name**</li><li>User-defined name</li></ul>	|	The system name used to identify the PowerVault Storage device. The name should be less than 30 characters and must not contain spaces.
	powervault_me4_snmp_notify_level [Required]	|	<ul><li>**none**</li><li>crit</li><li>error</li><li>warn</li><li>resolved</li><li>info</li></ul>	|	Select the SNMP notification levels for PowerVault Storage devices. 
	powervault_me4_raid_levels	[Required] |	<ul><li>**raid1**</li>Examples:<li>r5/raid5: 3-16</li><li>r6/raid6: 4-16</li><li>r10/raid10: 4-16</li><li>adapt: 12-128</li></ul> |	Enter the required RAID levels and the minimum and maximum number of disks for each RAID levels.
	powervault_me4_disk_range	[Required]	|	<ul><li>0.1-2</li></ul>	|	Enter the range of disks in the format *enclosure-number.disk-range,enclosure-number.disk-range*. For example, to select disks 3 to 12 in enclosure 1 and to select disks 5 to 23 in enclosure 2, you must enter `1.3-12, 2.5-23`. </br>A RAID 10 or 50 disk group with disks in subgroups are separated by colons (with no spaces). RAID-10 example:1.1-2:1.3-4:1.7,1.10 </br>**NOTE**: Ensure that the entered disk location is empty and the **Usage** column lists the range as **AVAIL**. The disk range specified must be of the same vendor and they must have the same description.  
	powervault_me4_k8s_volume_name [Required] |	<ul><li>**k8s_volume**</li><li>User-defined name</li></ul> |	Enter the Kubernetes volume name.	
	powervault_me4_slurm_volume_name [Required] |	<ul><li>**slurm_volume**</li><li>User-defined name</li></ul> |	Enter the Slurm volume name.
	powervault_me4_disk_group_name |	<ul><li>**omnia**</li><li>User-defined name</li></ul> |	Enter the group name of the disk.
	powervault_me4_disk_partition_size [Required] |	<ul><li>**5**</li><li>Any value between 5-90</li></ul> |	Enter the partition size which would be used as an NFS share.  
	powervault_me4_volume_size [Required] |	<ul><li>**100GB**</li><li>Custom value</li></ul> |	Enter the volume size in the format: *SizeTB*, *SizeGB*, *SizeMB*, or *SizeB*.  
	powervault_me4_pool [Required] |	<ul><li>**a** (or A)</li><li>b (or B)</li></ul> |	Enter the pool for the volume.
	powervault_me4_pool_type [Required] |	<ul><li>Virtual</li><li>**Linear** </li></ul> |	Select the type of pool to be deployed on PowerVault. Ensure that all pools on the device are exclusively virtual or linear.
	powervault_me4_server_nic [Required] |	<ul><li>**eno1**</li></ul> |	Enter the NIC of the server to which the PowerVault Storage is connected.
		
	
## Deploy Omnia Control Plane
Before you configure the PowerVault Storage devices, you must complete the deployment of Omnia control plane. Go to Step 8 in the [Steps to install the Omnia Control Plane](../../INSTALL_OMNIA_CONTROL_PLANE.md#steps-to-deploy-the-omnia-control-plane) file to run the `ansible-playbook control_plane.yml` file.