Installing the hardware, Setting up remote copy connections – HP StorageWorks XP Remote Web Console Software User Manual
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URz does not allow the secondary data volume to be online (except while the pair is split). If the
secondary data volume is online, the URz add pair operation will fail.
WARNING!
If the URz secondary data volumes are physically attached to the same host server(s)
as the URz primary data volumes, the following problem can occur:
•
When a URz pair is released, the old secondary data volume is usually offline. If the host is
then restarted, the system administrator may be offered both volumes and asked which volume
should be left offline. This can be confusing and is prone to error.
•
If the URz secondary data volumes and primary data volumes are connected to the same
host(s), HP strongly recommends that the secondary data volumes are defined to remain offline
to avoid this problem.
Installing the Hardware
Initial installation of the URz hardware is performed by the user and the HP representative. To
install the hardware required for URz operations:
1.
User: Identify the locations of the URz primary and secondary data volumes (primary data
volumes and secondary data volumes), so that the URz hardware can be installed and
configured properly.
2.
User and HP Representative: Make sure that the primary storage system(s) and secondary
storage system(s) are configured for XP Remote Web Console operations (for example, SVP
connected to LAN). See the XP Remote Web Console user’s guide for information and
instructions on setting up XP Remote Web Console operations.
3.
HP Representative: Make sure that the primary storage systems and secondary storage systems
are properly configured for URz operations (for example, cache, NVS) (see
. Make sure that the desired system option modes are enabled (see
“Metadata Information” (page 21)
). Make sure that adequate cache is installed and available
for URz operations. 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 Representative: Make sure the primary storage systems are configured to report sense
information to the host(s). The secondary storage systems should also be attached to a host
server to enable reporting of sense information in case of a problem with an secondary data
volume or secondary storage system. If the remote site is unattended, the secondary storage
systems should be attached to a host server at the primary site, so that the system administrator
can monitor the operational condition of the secondary storage systems.
5.
HP Representative: If power sequence control cables are used, set the power select switch for
the cluster to LOCAL to prevent the primary storage system from being powered off by the
host. Also make sure the secondary storage system will not be powered off during URz
operations. See
Setting up Remote Copy Connections
for further information on powering
off/on the primary storage systems and secondary storage systems.
6.
HP Representative: Install the URz remote copy connections between the primary storage
system(s) and secondary storage system(s). This hardware (optical fibre cables, switches, etc.)
is supplied by the user.
See
Setting up Remote Copy Connections
for remote copy configurations. Distribute the paths
between different storage clusters and switches to provide maximum flexibility and availability.
The logical paths between the primary storage system and secondary storage system must be
separate from the logical paths between the host and secondary storage system.
Setting up Remote Copy Connections
shows the remote copy connection configurations for URz operations. The
primary storage system and secondary storage system of each URz pair must be connected via
optical fiber cables. If you use multimode shortwave optical fiber cables, fibre cables up to 1.5
Installing the Hardware
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