IBM 990 6.2.2 Exploitation support for z/OS

Chapter 6. Software support 137

Draft Document for Review April 7, 2004 6:15 pm 6947ch06.fm

򐂰z/OS with Compatibility support must be IPLd in a partition that has an LPAR identifier in

the range 0-F. If the LPAR identifier is outside of this range, then z/OS will terminate with a

07C-02 wait state.

򐂰Dynamic activates for hardware changes can only be done for LCSS 0. A Power-on Reset

is required for changes to other Logical Channel Subsystems. Dynamic activate for

hardware changes within LCSS 0 cannot be done if the resource is also defined in any

other LCSS. For example, if a DASD control unit has connections to LCSS 1, 2, or 3 then

additional connections cannot be added to LCSS 0 dynamically while in Compatibility

mode. Software activates can be done regardless of the number of LCSSs defined.

The Compatibility Support feature is an optional unpriced orderable feature that is required to

allow z/OS Version 1 Release 4 to run on a z990. It offers the capability to execute on the

hardware in a way that is compatible with earlier processor models, but without exploitation of

new functions, although some new features (such as the increased number of HiperSockets)

can be used. z/OS Version. This feature is no longer orderable and is replaced by the z/OS

V1.4 z990 Exploitation Support feature since February 24, 2004.

6.2.2 Exploitation support for z/OS

Exploitation support for the z990 is delivered for z/OS V1.4. Follow-on z/OS releases will have

Exploitation support included. For z/OS V1.4 it is shipped as a separately orderable feature.

z/OS Exploitation support allows:

򐂰z/OS to run in a partition defined to any Logical Channel Subsystem

򐂰z/OS to run in a partition with an LPAR identifier greater than x’F’.

򐂰z/OS dynamic activates for hardware changes to any Logical Channel Subsystem.

The Exploitation Support feature is an optional unpriced orderable feature that provides

exploitation support for two Logical Channel Subsystems and 30 logical partitions. This is a

mandatory feature when ordering z/OS V1.4 as of February 24, 2004.

Other exploitation items are:

򐂰Dynamic I/O support to dynamically add, change, and delete channel paths, control units,

and devices in multiple Logical Channel Subsystems

򐂰Up to four Logical Channel Subsystems, with HCD PTFs

򐂰External spanned channels

Exploitation Support (and compatibility support) is integrated into the base of z/OS V1.5 and

later releases. Exploitation support in z/OS V1.5 offers:

򐂰Up to 30 Logical Partitions

򐂰Up to four Logical Channel Subsystems, with HCD PTFs

Exploitation Support (and compatibility support) is integrated into the base of z/OS V1.6

(planned to be available in September 2004). Some unique support offered by this release is:

򐂰Dynamic addition and deletion of a logical partition name.