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282 DS8000 Series: Concepts and Architecture
13.1 Software enhancements for the DS8000
A number of enhancements have been introduced into the z/OS, z/VM, z/VSE,VSE/ESA and
TPF operating systems to support the DS8000. The enhancements are not just to support the
DS8000, but also to provide additional benefits that are not specific to the DS8000.
13.2 z/OS enhancements
The DS8000 series simplifies system deployment by supporting major server platforms. The
DS8000 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 DS8000 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 DS8000 as a 2105 device.
The PSP information can be found at:
http://www-1.ibm.com/servers/resourcelink/svc03100.nsf?OpenDatabase
The software enhancements have been introduced in the following areas:
Scalability support
Large Volume Support (LVS)
Read availability mask support
Initial Program Load (IPL) enhancements
DS8000 definition to host software
Read control unit and device recognition for DS8000
New performance statistics
Resource Management Facility (RMF)
Migration considerations
Coexistence considerations
13.2.1 Scalability support
The 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 well with a DS8000 that
Important: Always review the latest Preventative Service Planning (PSP) 2107DEVICE
bucket for software updates.