HP XP for Compatible Extended Remote Copy Software Licenses - Manual (Page 24)

• XRC operations, as well as TrueCopy Asynchronous for Mainframe operations, utilize additional
cache to store the sidefile queue of asynchronous record sets.
• If you are maintaining XRC pairs and TrueCopy Asynchronous pairs, please consider
asynchronous remote copy workloads, and then make sure that your XP24000/XP20000 Disk
Array storage systems have adequate cache installed and available.
• RESUME operation messages
If the ANTX5123W console message is displayed during the RESUME operation for XRC pairs,
the operation might be unsuccessful. In this case, you must perform the XDELPAIR operation to
delete the pairs, and then perform the XADDPAIR operation to create the pairs again.
• XADDPAIR operation messages
If the ANTA5107E (RC=9014, REAS=604 or REAS=608) console message is displayed during
the XADDPAIR operation, the XRC program product may not be installed. Check whether the XRC
program product is installed. If the XRC program product is not installed, please install it.
• FICON host interface path considerations
• If XRC is used with FICON host interface, you must be careful about the path combination with
serial channel (ESCON). Table 6 on page 24 lists possible combinations of paths between the
primary host and the primary storage system and paths between the primary storage system
and the secondary host. Refer to
Table 6 on page 24 when you use FICON.
Table 6 Combinations of ESCON and FICON Paths
Support Paths between Primary
storage system and
Secondary Host
Paths between Primary
Host and Primary storage
system
Supported ESCON ESCON
FICON ESCON
Not recommended ESCON
FICON
(see
Note)
Supported FICON
FICON
(see
Note)
• Since FICON achieves faster transfer speed than ESCON, you need to consider the difference
in performance between FICON and ESCON paths. If FICON is used for the connection
between the primary host and the primary storage system, using ESCON for connecting the
primary storage system and the secondary host is not recommended. In this case, use FICON
instead.
• USP Operation modes and options settings
• The operation modes of Compatible XRC in conventional models and the corresponding option
settings in the XP24000/XP20000 Disk Array storage systems are show in Table 7 on page 25.
Conventional operation mode setting of Compatible XRC in the XP24000/XP20000 Disk Array
storage systems are disabled. Therefore, execute the setting that alternates the conventional
Preparing for Compatible XRC Operations 24