NonStop NS14000 Series Planning Guide (H06.13+)

Fibre Channel Disk Module (FCDM)
The FCDM is a rackmounted enclosure that contains:
• Up to 14 Fibre Channel arbitrated loop disk drives (enclosure front)
• Environmental monitoring unit (EMU) (enclosure rear)
• Fibre Channel arbitrated loop (FC-AL) modules (enclosure rear)
An FCDM connects to the Fibre Channel ports on a VIO enclosure. You can daisy-chain together
up to four FCDMs to reduce the number of Fibre Channel ports required. Up to eight daisy-chain
configurations are supported when using all embedded and optional Fibre Channel ports for a
maximum of 32 FCDMs. This illustration shows a fully populated Fibre Channel disk module:
Maintenance Switch (Ethernet)
The ProCurve maintenance switch includes management features that the NonStop NS14000
series system requires and provides communication between the NS14000 series system through
the VIO enclosures, the optional UPS, and the system console running HP NonStop Open System
Management (OSM). The maintenance switch includes enough ports to support multiple systems.
The maintenance switch mounts in the modular cabinet, but no restrictions exist for its placement.
This illustration shows an example of two maintenance switches installed in the top of a cabinet:
24 NonStop NS14000 Series System Overview