When a new disk device is attached, it usually starts out in a raw, unpartitioned state. Before it can be used, the disk device must be partitioned. The Disk Devices panel provides a list of disk devices, their status and the ability to manage the devices. 

The Partition All button finds all devices without a partition and creates a partition on each device. Devices which are in use or already contain a partition are ignored. 

The Create Partition button adds a partition to a device that does not contain a partition. First, select a device in the device list grid by choosing a row, then press the Create Partition button.

To remove a partition, select a device that is not in use and then press the Remove Partition button. Devices which are marked as "Used in pool" are not eligible for partition removal.

Press the Refresh button to rescan the available devices and display the currently available devices.

Certain types of devices can be added at run-time. Click Add Device and choose the type of device to add, then follow the on-screen instructions for adding the device.

Certain types of dynamic devices can be removed at run-time. To delete a dynamic device that is no longer in use within a pool, select the device in the list to choose its grid row, then press the Delete Device button and confirm deletion of the device.

Device show a list of devices.

The Total size shows the amount of data storage available on the raw device, before partitioning and addition to a storage pool.

The make (vendor) and model of the device, with the type of device shown in parenthesis.

The Device Usage provided details about how the device is currently used, or what it needs to become useful. The device can be in one of several states:

• Needs partitioning
• Available to assign to a storage pool
• Used in a pool, along with the name of the pool in which it is used

Extra Disk Info provides additional information some devices have available for them.