HP StorageWorks XP24000 Continuous Access Journal Software User and Reference Guide, v01 (T5278-96001, June 2007)

RCU
0.5 km. If you use single-mode long wave optical fiber cables, fibre cables up to 30 km in length and up
to
two switches are required for distances greater than 1 0 km. Continuous Access Journal op erations can
be performed at distances of up to 30 km (18 .6 miles) using standard single-mode longwave support.
For further distance, channel extender connections are required. For distances greater than 43 km (26.7
miles), approved channel extender products and telecommunications lines are required.
Multimode shortwave optical fiber cables up to 0.5 km
Multimode longwave optical fiber cables up to 10 km
MCU/RCU
RCU/MCU
O
p
tical fiber cables
Shortwave: 1.5 km
Switch
Channel extender
MCU/RCU
RCU/MCU
A
TM telecommunications line
Shortwave: 0.5 km
Max. 2 switches connection
Longwave: 10 km
MCU/RCU
RCU/MCU
RCU/MCUMCU/RCU
Longwave:30 km
Max. 2 switches connection
Unrestricted distance
MCU/
RCUMCU/
RCU/MCU
Figure 7 Con tinuous Access Journal Remote C o py C o nn ection Configura tions
The remote copy conne ction between the primary storage system and secondar y storage system p rovides
three different configurations:
•
Direct connection (see Figure 8 on page 48),
•
Switch connection (see Figure 9 on page 49),
•
Extender connection (see Figure 10 on page 49).
Initiator port
RCU target port
Ordinary fibre-channel
interface port (target port)
Host
(Primary)
*1 Fabric OFF
Host
(Secondary)
*1
NL
_
Port
MCU
RCU
NL
_
Port
* To set ports, use LUN Manager and set the port topology to: Fabric off, FC-AL.
Figure 8 Direct Remote Copy Connections
48
Preparing for Continuous Access Journal Operations