HP StorageWorks XP Remote Web Console Software - Manual (Page 54)

StorageWorks XP24000/XP20000 Remote Web Console User Guide for information and
instructions on setting up Remote Web Console operations.
3. HP Technical Support Representative: Make sure that the MCUs and RCUs are properly
configured for XP Continuous Access operations (for example, cache and NVS). Make sure
that the desired system option modes are enabled. Make sure that adequate cache is installed
and available for any asynchronous operations (XP Continuous Access Asynchronous, XRC,
and CC). You must also consider the amount of Cache Residency Manager data to be stored
in cache when determining the required amount of cache.
4. HP Technical Support Representative: Make sure the MCUs are configured to report sense
information to the host(s). The RCUs should also be attached to a host server to enable reporting
of sense information in case of a problem with an S-VOL or RCU. If the remote site is
unattended, the RCUs should be attached to a host server at the primary site, so that the system
administrator can monitor the operational condition of the RCUs.
5. HP Technical Support Representative: If power sequence control cables are used, set the power
select switch for the cluster to LOCAL to prevent the MCU from being powered off by the host.
Also make sure the RCU will not be powered off during XP Continuous Access operations.
6. HP Technical Support Representative: Install the Fibre Channel adapter features (for example,
DKC-F510I-32FS2 and DKC-F515I-MIX2). See the Installation section of the DKC6101
Maintenance Manual for further information.
For DKC-F510I-32FS2 and DKC-F515I-MIX2, you can set each port independently as an
initiator or RCU Target port, enabling you to connect hosts and remote links randomly.
7. HP Technical Support Representative: Install the XP Continuous Access remote copy connections
between the MCU(s) and RCU(s). This hardware (optical fibre cables, switches, and so on) is
supplied by the user. Distribute the paths between different storage clusters and switches to
provide maximum flexibility and availability. The logical paths between the MCU and RCU
must be separate from the logical paths between the host and RCU. All remote copy activities
between two storage systems (that is, XP Continuous Access Synchronous, XP Continuous
Access Asynchronous, TrueCopy Asynchronous for Mainframe, and TrueCopy Asynchronous
for Mainframe) can share the same remote copy connections.
Remote Copy Connections
Figure 11 (page 55) shows the remote copy connection configurations for Fibre Channel interface
XP Continuous Access operations. The MCU and RCU of each XP Continuous Access pair must be
connected via multimode shortwave or single-mode longwave optical fibre cables.
If you use multimode shortwave optical fibre cables, switch is required for distances greater than
0.5 km. You can use up to two switches, and lengthen the distances up to 1.5 km.
For the distances greater than 1.5 km, you need to use single-mode longwave optical fibre cables,
which is shorter than 10 km. For distances greater than 10 km, you can use up to 2 switches, and
lengthen the distances up to 30 km.
XP Continuous Access operations can be performed at distances of up to 30 km (18.6 miles) using
standard single-mode longwave support. For the distances longer than 30 km, you need a channel
extender connection. For the distances longer than 43 km, you need to use approved channel
extenders and communication lines.
For more information on approved channel extender, contact HP Technical Support.
Direct connections up to 10 km with single-mode longwave Fibre channel interface cables are
supported. The maximum distance for the best performance may differ in relation to the link speed.
Table 22 (page 55) describes the relation between the link speed and the maximum distance for
best performance.
54 Preparing for XP Continuous Access Operations