1

Determine the maximum number of DASD, tape, and MSS devices permitted on this z/OS system. Compare these numbers with the Computer System Profile sheet to determine if there is sufficient room for growth.

2

Enter the IBM‑supplied device name SYSALLDA (or a local equivalent) and ALL as the device status to verify that public, private, and storage mount status agrees with data center policy.

3

Check to see if your installation has removable DASD media (3330, 3340, 3370 device types). Enter 3330 as the device name to verify that the number of removable media disk drives agrees with the Computer System Profile. Repeat this test with device names 3340 and 3370.

4

If you found removable media in Step 3, determine if the data center wrote procedures for the control of removable disk packs. These procedures should detail the conditions for mounting or dismounting a pack and the rules for importing or removing a pack from the data center.

5

Verify that the numbers and types of devices agree with vendor’s billing documents to ensure the accuracy of those billings.

6

Determine if the data center entered into purchases of obsolete equipment based on lease‑versus‑buy analysis, which ignores newer, more cost effective equipment.