HP XP7 Storage - Manual (Page 47)

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For distances from 1.5 km to 10 km, (4,920 feet to 6.2miles) single mode longwave optical
fibre cables are required.
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For distances from 10 km to 30 km (6.2 to 18.6 miles), single-mode longwave Fibre Channel
interface cables with up to two switches are required.
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For distances greater than 30 km, approved third-party channel extender products and
telecommunications lines are required. Continuous Access Synchronous Z operations typically
do not extend past 30 km.
With Fibre Channel connections, no special settings are required for XP7.
Direct connections up to 10 km with single-mode longwave Fibre Channel interface cables are
supported. Link speed determines the maximum distance you can transfer data and still achieve
good performance. The following table shows maximum distances at which performance is
maintained per link speed, over single-mode longwave Fibre Channel.
Distance maximum performance maintained Link speed
10 km 1 Gbps
6 km 2 Gbps
3 km 4 Gbps
2 km 8 Gbps
Your HP account team can provide the latest information about the availability of serial-channel
Continuous Access Synchronous Z connections.
Supported data path configurations
Three Fibre Channel configurations are supported for Continuous Access Synchronous Z:
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“Direct connection” (page 47)
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“Switch connection” (page 47)
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“Extender connection” (page 48)
Direct connection
The following figure shows a direct connection, in which two devices are connected directly
together.
Set port topology to: Fab off, FC-AL.
Switch connection
The following figure shows a switch connection, in which up to three optical fibre cables are
connected using switches. Two switches can be used.
Data path requirements and configurations 47