z/OS V1R4 z990 Exploitation support If you run z/OS V1.4 on System z9-109 and want to exploit some of the new features introduced with the z9-109, you need to install the z/OS V1R4 z990 Exploitation Feature along with some PTFs. 3.7.1 Operating system support summary Table 3-8 summarizes the minimum levels of operating systems required by z9-109. z/OS V1 R4 must have either the Compatibility support feature or the Exploitation support feature installed to run on the z9-109. z/OS 1.7 is the recommended level to support all functionality. Table 3-8 z9-109 operating system support summary Operating system z/OS V1 R4 z/OS V1 R5 z/OS V1 R6 z/OS V1 R7 z/VM V4 R4 z/VM V5 R1 z/VM V5 R2 Linux on System z9 - 64-bit Linux 390 - 31-bit VSE/ESATM V2 R6 VSE/ESA V2 R7 z/VSETM V3 R1 TFP V4 R1 z/TFP V1 R1 ESA/390 (31-bit Mode) z/Architect ( 64-bit mode ) Yes Yes Yes Yes Yes Yes Yes Yes No No No No Yes Yes Support Basic support Basic support Yes a No No No Yes No No No Yes Yes Yes Yes Yes Yes Support for new HW functions Basic support Basic support Basic support Basic support Basic support a. Support through the IBM Accommodation Offering only available for z/OS 1.4 Basic support means that the operating system is capable of recognizing the z9-109 hardware features, but does not exploit them. Support for new HW functions means that some z9-109 hardware features are exploited. The features exploited may depend on a particular operating system. For example, the program-directed re-IPL feature is exploited only by Linux on System z9. When running in 64-bit mode (z/Architecture), then Expanded Storage (ES) is supported by z/VM, but not by z/OS. However, if z/OS is used in 31-bit mode (ESA/390), then expanded Storage may be used. Table 3-9 on page 74 lists the lowest levels of various operating systems that support the indicated functions on the z9-109. These lower levels may require PTFs, SPEs, or other additional software to provide the function. Chapter 3. I/O configuration planning 73