content_image/993770.jpg
## Using the CLI 

These steps can also be done by using the CLI, as shown in Example 9-1. 

# svctask mkmdiskgrp -ext 256 -warning 100% -name UD_pool 

## 9.2.3 Creating the MDisk arrays or discovering unmanaged MDisks 

When you use the Storwize V5000 or V7000 server, you can use internal or external disks to create MDisks. 

Note:  Storwize V3700 allows only internal disks; the SAN Volume Controller allows only external disks. 

## Using the GUI 

To accomplish this task in the GUI, complete the following steps: 

1. Hover the cursor over the Pools  icon. The Pools menu opens (Figure 9-4). 

<img src='content_image/993770.jpg'>

2. To create an MDisk with internal disks, click  Internal Storage  to display the list of candidate internal disks. Select the drive class that you want to configure, for example, SAS disks for metadata and NL_SAS (or Serial Advanced Technology Attachment, also known as SATA) for user data. Then, click Configure Storage  (Figure 9-5 on page 130). 

Note:  If you want to determine the drives that will be spare, you can manually select them before this step and mark them spare  in the Use  column. For that, right-click the drive and select Mark As  followed by the spare  option. A good practice is to select one spare drive for each drawer and type of drive. 

