HP StorageWorks B-Series Remote Replication Solution Best Practices Guide (5697-6731, June 2007)

6 Related inform ation
This do cument covers FCI P disaster recovery solutions using the B-Series components. However, additional
technologies are also suppor ted. These include using native Fibre Channel with WDM technology, and
Continuous Access XP. Both of these technologies are supported with the B-Series components.
Dark Fiber/WDM
Besides extension over FCI P, the 400 MP Router and MP Router b lad e are supported with other types of
SAN extensio
ntechnology:
• Native Fibre C hannel—This choice is based on direct Fibre Channel extension using short or
long-wavelength, small form pluggable (SFPs) and Dark Fiber. Distance support is dependent on
the SFP range, but is usually below 50km. With this option, the performance is the best possible,
both in term of latency and throughput. Cost varies from “low” for short runs using multi-mode
fiber optic (MMF) cables and shor t wavelength (SWL) media, to “high” using single-mode fiber
optic (SMF) cables and long wavelength (LW L and ELWL) transceivers. Compared to other
extension
options, LW L transceivers a re inexpensive and easy to deploy. This SAN extension
option does have two drawbacks: limited d istances are supportable and the cost of fiber runs.
Dedicated dark fiber links are used for every port of bandwidth required, and the dark fiber
cables th
emselves can be expensive.
• Native Fibre Channel with Wavelength Division Multiplexing ( WDM )−SAN extension utiliz ing
WDM (either DWDM or CW DM) through an existing optical metropolitan area network (MA N ),
which can handle multiple protocols. Distances range from 50 km up to hundreds of kilometers.
CWDM is lower cost than DWDM, which offers longer distances. Both CWDM (8 Wave-lengths)
& DWDM (32 Wave-Lengths) offer the benefit of multiple wavelengths of light over a single
fiber optic cable for increased link capacity.
For mor
e details on these SAN extension technologies with B-Series fabrics, see the SAN extensions
secti
on of HP StorageWorks SAN d esign reference guide at h
ttp://www.hp.com/go /sandesignguide.
XP array family and Continuous Access XP
The 400 MP Router and MP Router Blade can also be used in a disaster recovery soluti on using
Continuous Access XP and the XP family of storage arrays (XP10000/XP12000). The HP StorageWorks
XP10000 Disk Array, an entry-level high-end array, delivers always-on availability for mission-critical IT
environments. Boot-once scalability an d heterogeneous connectivity in a compact footprint increases
business agility and decreases the stress of running applications where downtime is not an option. The
HP StorageWorks XP1200 0 Disk Array is an enterprise class storage system that delivers state-of-the-art
reliability and always-on availability for mission-critical applications where downtime is not a n option.
Both the XP10000 and the XP12000 are designed for organizations that demand the most from their
storage. Complete redundancy throughout the architecture provides no single point of failure, and
non-disruptive online upgrades ensure that data is always available. HP StorageWorks Continuous
Access XP software products are high availability data and disaster recovery solutions that deliver
host-independent, real-time, remote data mirroring between XP disk arrays. With seamless integration
into a full spectrum of remote mirroring based solutions, these products can b e deployed in solutions
ranging from data migration to high availability server clustering.
For more information on Continuous Access XP software, see h
ttp://www.hp.com/go/storageworks/
software.
For more information on XP disk arrays, see h
ttp://www.hp.com/go /storage/xparrays.
B-Series remote replication solution
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