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Setting up a Year 2000 S/390 Test System

With the year 2000 approaching fast, it is critical that you begin the testing phase of your Year 2000 project soon. Testing is projected to be over 50% of your overall project. Because of the possible complexity and interactions between system components, IBM is providing the following guidance on testing.

By their very nature,Year 2000 exposures are time-sensitive and time-driven. Basic Year 2000 testing requires that you set the system date and time to a point where Year 2000 exposures can be detected, then

removed.

Any of the S/390 operating systems with a clock set to a future date can be run in any one of the following ways:

-PR/SM1 LPAR

-as a VM guest

-on a dedicated machine

This is also true for images in LPARs, guests on VM, or when running a native OS/390 or MVS system.2

Each LPAR or VM guest has its own logical clock which is separate and distinct from the clocks of all other LPARs or guests running on the same physical machine. A future date in one LPAR will not affect the date set in another LPAR. Any program, application, or system running in the image uses the same future date. The date is set at IPL time or very early in the IPL process and is no different than the date running on the physical hardware.

The environment you choose will depend on your available resources and skills, and system availability or constraints.

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