Software Enhancements For The Ds6000; Z/Os Enhancements; Scalability Support - IBM TotalStorage DS6000 Series Redbooks

12.1 Software enhancements for the DS6000

A number of enhancements have been introduced into the z/OS, z/VM, z/VSE,VSE/ESA and
TPF operating systems to support the DS6000. The enhancements are not just to support the
DS6000, but also to provide additional benefits that are not specific to the DS6000.

12.2 z/OS enhancements

The DS6000 series simplifies system deployment by supporting major server platforms. The
DS6000 will be supported on the following releases of the z/OS operating system and
functional products:
z/OS 1.4 and higher
Device support facility (ICKDSF) Release 17
Environmental Record Editing and Printing (EREP) 3.5
DFSORT™
To exploit the DS6000 in exploitation mode, the Data Facilities Storage Management
Subsystem (DFSMS) product of z/Series software is enhanced by way of a Small
Programming Enhancement (SPE).
Hosts with operating system software levels prior to z/OS 1.4 are not supported. zLinux will
only recognize the DS6000 as a 2105 device.
Important: Always review the latest Preventative Service Planning (PSP) 1750DEVICE
bucket for software updates.
The PSP information can be found at:
http://www-1.ibm.com/servers/resourcelink/svc03100.nsf?OpenDatabase
Basic device support has been enhanced in the following areas:

Scalability support

Large Volume Support (LVS)
Read availability mask support
Initial Program Load (IPL) enhancements
DS6000 definition to host software
Read Control Unit and Device Recognition for DS6000
New performance statistics
Resource Measurement Facility (RMF)
Preferred pathing
Migration considerations
Coexistence considerations
12.2.1 Scalability support
The Input/Output subsystem (IOS) recovery is designed to support a small number of devices
per control unit. Today, a unit check is presented on all devices at failover. This does not scale
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DS6000 Series: Concepts and Architecture