HP NonStop G-Series - Manual (Page 25)

Nomadic Disk Hardware and Software
ServerNet Nomadic Disk User’s Guide— 425485-001
2 -3
Nomadic Disk Hardware
Nomadic Disk Hardware
The hardware needed in your Nomadic Disk configuration depends on whether you have
remote mirroring or fiber-optic switching, and the distances between the 6760 ServerNet
device adapter (ServerNet/DA) and the disk modules.
Required Hardware for All Configurations
Required Hardware for Remote Mirroring
Because all enclosures are normally required to be connected to the same power grid,
the maximum distance between an I/O enclosure and a Modular ServerNet expansion
board (MSEB) with either an single-mode fiber-optic (SMF) PIC or MMF PIC is
usually limited to 25 meters. To increase this distance, additional hardware is required.
For more information about managing an I/O enclosure connected on a different power
grid, refer to
Appendix B, Operational Considerations for Remote Mirroring .
Remote mirroring up to 5 kilometers requires:
Hardware
Component Function For Troubleshooting
Information, refer to:
45xx disk
modules
(containing up to
8 disk drives
each) Contain the database SCF Reference Manual for
the Storage Subsystem
45xx Modular Disk
Subsystem Manual for
G-series Releases
ServerNet/DA Fiber-optic ServerNet
addressable controllers (F-SACs)
provide one ServerNet/DA port
in a system enclosure for
connections to a 45xx disk
module. 6760 ServerNet/DA Manual
SCF Reference Manual for
the Storage Subsystem
Multimode
fiber-optic
(MMF) cables Connect a ServerNet/DA F-SAC
to a 45xx disk module Contact professional
services
Hardware
Component Function For Troubleshooting
Information, refer to:
Single mode
fiber-optic (SMF)
cable Connects an MSEB SMF PIC to
an I/O enclosure containing I/O
multifunction (IOMF) 2 CRUs Contact professional
services