Chapter 7. Software support 263
7.3.32 z/OS Discovery and Auto-Configuration
z/OS Discovery and Auto-Configuration (zDAC) is designed to automatically run a number of
I/O configuration definition tasks for new and changed disk and tape controllers that are
connected to a switch or director, when attached to a FICON channel.
The zDAC function is integrated into the existing hardware configuration definition (HCD).
Clients can define a policy that can include preferences for availability and bandwidth that
include parallel access volume (PAV) definitions, control unit numbers, and device number
ranges. When new controllers are added to an I/O configuration or changes are made to
existing controllers, the system discovers them and proposes configuration changes that are
based on that policy.
zDAC provides real-time discovery for the FICON fabric, subsystem, and I/O device resource
changes from z/OS. By exploring the discovered control units for defined logical control units
(LCUs) and devices, zDAC compares the discovered controller information with the current
system configuration. It then determines delta changes to the configuration for a proposed
configuration.
All added or changed logical control units and devices are added into the proposed
configuration. They are assigned proposed control unit and device numbers, and channel
paths that are based on the defined policy. zDAC uses channel path chosen algorithms to
minimize single points of failure. The zDAC proposed configurations are created as work I/O
definition files (IODF) that can be converted to production IODFs and activated.
zDAC is designed to run discovery for all systems in a sysplex that support the function.
Therefore, zDAC helps to simplify I/O configuration on z13s systems that run z/OS, and
reduces complexity and setup time.
zHPF
single-track
operations
CHPID type
FC
V1R12 V6R2
a
N/A N/A SUSE Linux Enterprise Server 12
SUSE Linux Enterprise Server 11
Red Hat RHEL 7
Red Hat RHEL 6
zHPF
multitrack
operations
CHPID type
FC
V1R12
a
V6R2
a
N/A N/A SUSE Linux Enterprise Server 12
SUSE Linux Enterprise Server 11
Red Hat RHEL 7
Red Hat RHEL 6
Support of
SCSI devices
CHPID type
FCP
N/A V6R2
a
V5R1 N/A SUSE Linux Enterprise Server 12
SUSE Linux Enterprise Server 11
Red Hat RHEL 7
Red Hat RHEL 6
Support of
T10-DIF
CHPID type
FCP
N/A V6R2
a
N/A N/A SUSE Linux Enterprise Server 12
SUSE Linux Enterprise Server 11
Red Hat RHEL 7
Red Hat RHEL 6
a. PTFs are required.
Operating
system
z/OS z/VM z/VSE z/TPF Linux on z Systems
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