Ipl From An Alternative Subchannel Set; Modified Indirect Data Address Word Facility; Hipersockets Completion Queue - IBM z13s Technical Manual

Table 7-21 lists the minimum operating systems level that is required on the z13s.
Table 7-21 Minimum software requirement for four subchannel sets
Operating system
z/OS
z/VM
Linux on z Systems

7.3.20 IPL from an alternative subchannel set

z13s supports IPL from subchannel set 1 (SS1), or subchannel set 2 (SS2) in addition to
subchannel set 0. For more information, see "IPL from an alternate subchannel set" on
page 192.

7.3.21 Modified Indirect Data Address Word facility

The Modified Indirect Data Address Word (MIDAW) facility improves FICON performance. It
provides a more efficient channel command word (CCW)/indirect data address word (IDAW)
structure for certain categories of data-chaining I/O operations.
Support for the MIDAW facility when running z/OS as a guest of z/VM requires z/VM V6R2 or
later. For more information, see 7.9, "Simultaneous multithreading" on page 295.
Table 7-22 lists the minimum support requirements for MIDAW.
Table 7-22 Minimum support requirements for MIDAW
Operating system
z/OS
z/VM

7.3.22 HiperSockets Completion Queue

The HiperSockets Completion Queue function is implemented on z13, z13s, zEC12, zBC12,
z196, and z114 servers. The HiperSockets Completion Queue function is designed to allow
HiperSockets to transfer data synchronously if possible, and asynchronously if necessary.
Therefore, it combines ultra-low latency with more tolerance for traffic peaks. HiperSockets
Completion Queue can be especially helpful in burst situations.
Table 7-23 lists the minimum support requirements for HiperSockets Completion Queue.
Table 7-23 Minimum support requirements for HiperSockets Completion Queue
Operating system
z/OS
z/VSE
z/VM
Support requirements
z/OS V1R13 with PTFs
z/VM V6R2 with PTF
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise Server 11
Red Hat RHEL 7
Red Hat RHEL 6
Support requirements
z/OS V1R12
z/VM V6R2 for guest use
Support requirements
a
z/OS V1R13
a
z/VSE V5R1
a
z/VM V6R2
Chapter 7. Software support
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