Creating arrays for CKD volumes using the DS CLI

Complete this task to create arrays for CKD volumes using the DS CLI commands.

The machine type 1750 must contain at least one storage enclosure, with a minimum of four DDMs.

The DDMs of a storage enclosure are partitioned into array sites. A machine type 1750 array site consists of four DDMs in one storage enclosure of a storage enclosure pair, with two to eight (four DDM) array sites per storage enclosure pair. All array sites of a storage enclosure pair have identical capacity, rpm, and interface characteristics, and an interface to a common DA pair.

The creation of arrays is based on the array sites that are associated with the storage unit. You must make an array from 1 or 2 array sites. An array inherits the characteristics of its parent array sites, and is given a RAID type attribute (5 or 10). A 1750 Array object of RAID type 5 or 10 is made from one or two (4 DDMs) array sites.

Note: The array status is “unassigned” until the array is assigned to a rank.

Use the lsarraysite and mkarray commands to create the arrays. You must be logged into the DS CLI application and connected to the storage unit that will be used for open systems host system storage.

Perform the following steps to create arrays for a CKD volume configuration:

Issue the lsarraysite command to find the unassigned array sites. Enter the lsarraysite command at the dscli command prompt with the following parameters and variables:
```
dscli>lsarraysite -dev storage_image_ID -state unassigned
```
Note: If this is your first time creating volumes, you will see all the arrays with a state of "unassigned".
Press Enter. A report of unassigned array sites is displayed. Use the list to identify unassigned array site capacity, rpm, and device adapter (DA) pair attributes. Record the RAID type for each array site.
Issue the mkarray command to create an array from each site with the status "unassigned". Enter the mkarray command at the dscli command prompt with the following parameters and variables:
```
dscli>mkarray -dev storage_image_ID -raidtype [5 | 10] -arsite array_site
```
Repeat this command until all unassigned array sites have been assigned to an array.
Notes:
1. You can specify one or two array sites for RAID types 5 and 10. If there are two array sites, both sites must be associated with a common DA pair ID. Two array sites must be separated by commas with no blank space in between. Example: S10,S11.
2. The new array site inherits the capacity, rpm, interface, and DA pair characteristics of its parent array sites. The state of the array is “unassigned” until it is assigned to a rank.