Viewing Hardware Resources and Device Descriptions

The Hardware Resources menu, HARDWARE, can be accessed from the command line of any menu by entering GO HARDWARE. The Hardware menu itemizes all the resources that can be displayed; so, from this menu we can select  an option corresponding to the resource we would like to work with.

We can view the system’s hardware components by issuing commands via the Hardware Resources Commands menu. To access the Hardware Resources Commands menu, enter GO CMDHDWRSC.

Use the Display Hardware Resources command, DSPHDWRSC, to display the hardware currently installed on the system. The Display Hardware Resources command, DSPHDWRSC, is usually not restricted. With it, hardware resources can only be displayed, their configuration cannot be altered.

To get a list of all system unit components as well as peripheral devices, enter the command DSPHDWRSC TYPE(*AHW). The *AHW parameter stands for All Hardware; using this parameter will display the combined contents of all hardware resource records. After entering this command, we will be presented with a screen labeled Display All Hardware Resources.

Note that although the Display All Hardware Resources screen does not show the physical relationship between the components, the physical location of each component can be viewed by typing 7 next to the item we wish to view and then pressing Enter.

To list all available communication resources, we issue the command DSPHDWRSC TYPE(*CMN). Using the *LWS type instead of *CMN will display the local work station resource information. To list all the storage device resource information, issue the command DSPHDWRSC TYPE(*STG).  To display all of the processor resources, enter the command DSPHWDRSC TYPE(*PRC).

To get an overview of system resources and their usage, we can use the Display System Status command, DSPSYSSTS. The DSPSYSSTS command will display for us the processor usage, as well as storage usage, referred to as the ASP, the auxiliary storage pool.

Every device attached to the IBM i must be described to the system with a device description. Most hardware is considered by the IBM i to be a device. A device description contains the attributes of the device it describes, including the type of device, the name of the controller to attach with, and the device’s unique address. Device descriptions have the object type *DEVD.

The Work with Device Descriptions command, WRKDEVD, enables us to display and work with device descriptions. Entering this command brings up the Work with Device Descriptions screen, which lists all of the device descriptions to which we have access. We optionally can use the DEVD parameter to specify a device description type to list. For example, entering the command WRKDEVD DEVD(*TAP) will list all of the tape devices on the system.  As another example, issuing the command WRKDEVD DEVD(*DSP) will list the device descriptions for all display stations.

We can display an individual device description with the Display Device Description command, DSPDEV. For example, if there is a device description called TAP01, we can enter the command DSPDEVD DEVD(TAP01).

UBD (Universal Backup Device) is a backup appliance that plugs into your IBM i and appears as a tape device

Viewing Hardware Resources and Device Descriptions