HP NonStop G-Series - Manual (Page 31)

Nomadic Disk Hardware and Software
ServerNet Nomadic Disk (Release 2) User’s Guide — 523968-001
2 -7
Extended Remote Mirroring Configuration
Table 2-3 lists the additional hardware required to extend the cabling length to the
backup site up to 40 kilometers.
When the processor and I/O enclosures for a system are too far apart for power-on
cables to be used, the processor and I/O enclosures must be powered up separately.
See
Appendix B, Operational Considerations for Remote Mirroring for details.
Figure 2-3. Single Processor, Extended, Internal Disk Drive Configuration
Table 2-3. Additional Hardware Required for Extended Remote Mirroring
Configurations
Hardware Item Function
Troubleshooting
Information
ServerNet Extender
Module (SEM) Increases distance that ServerNet signals
can be transmitted over fiber-optic cables
to 40 kilometers. Contact professional
services
MMF cabling Connects an MSEB MMF PIC to an SEM.
Connects an SEM to an IOMF 2 CRU.
Contact professional
services
SMF cabling Connects an SEM to a telco patch panel. Contact professional
services
VST207.vsd
\PRI
Processor
Enclosure
MSEB
MSEB
IOMF 2
I/O
Enclosure
46xx Disk Drives
Primary
Disks
Mirror
Disks
IOMF 2 IOMF 2
I/O
Enclosure
46xx Disk Drives
IOMF 2
SEM SEM
SEM SEM
40 km Maximum Cabling Length to Backup Site