HP XP P9500 Storage User Manual
Page 17
Table 1 General system requirements (continued)
Requirement
Item
•
The CCHH (logical cylinder address and logical head address) of R0 must be
identical to the physical cylinder address and physical head address of the
track.
•
The CCHH of each user record in a track must be unique.
For supported OS versions, see the HP SPOCK website:
for the latest information.
Supported mainframe host
platforms
Also, note the following:
•
Optional error report communications (ERC) function requires MVS/DFP 3.2.0
or later.
•
If the primary and/or secondary systems consist of several CPU complexes, a
SYSPLEX timer is required to provide a common time reference for the host I/O
time stamping function. However, the z/Linux operating system does not support
a SYSPLEX timer. As a result, I/O from the z/Linux host is not consistent. Also,
journal consistency is not maintained.
Fibre channel with either direct or switch connections.
Data path
When the system is connected to a P9500, you can use multiple path groups. This
is done by registering path groups with multiple path group IDs in the same storage
system. But note that only one path group can be specified for a mirror. Up to eight
paths can be registered in one path group.
Groups of logical paths, which allows you to configure or change the configuration
of multiple paths at the same time.
Path group
•
A maximum of eight logical paths can be registered in a path group
•
A maximum of 64 path groups can be set in a storage system.
•
The following Hexadecimal values can be set as the path group ID:
◦
0-255 when connected to P9500
◦
0 only when connected to XP24000/XP20000 Disk Array, XP12000 Disk
Array, or XP10000 Disk Array
•
For a mirror, the same path group ID must be used to connect the primary
storage system to the secondary system as is used to connect the systems in the
reverse direction.
•
The path group is specified during the add pair operation. It cannot be changed
by the resume pair or swap operation.
•
Path groups can be created and specified using RAID Manager. See
configuration setting commands in HP P9000 RAID Manager User Guide and
sample configuration definition files in HP P9000 RAID Manager Installation
and Configuration User Guide.
•
It is recommended that you specify different paths and path groups for Cnt Ac-S
Z and Cnt Ac-J Z secondary systems when using CU Free.
Volumes
•
A P-VOL may be copied to one S-VOL.
•
P-VOL and S-VOL must be equal in size.
•
P-VOL and S-VOL must be of same emulation type.
•
When Cnt Ac-S Z is cascaded with Cnt Ac-J Z, a data volume may be copied
to multiple data centers.
Limited per P9500 system. See
“Maximum number of pairs allowed ” (page 27)
Maximum number of pairs
System requirements
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