NonStop NS1200 Planning Guide

Each VIO enclosure contains:
• Connectivity for up to eight processors, configured in pairs
• Four embedded Fibre Channel ports and four optional ESS (Fibre Channel) ports for
communicating with storage devices such as a “Fibre Channel Disk Module” (page 18),
magnetic tape devices, or an Enterprise Storage System (ESS) disk
• Up to eight copper/optical Ethernet ports used for Ethernet connectivity
• Two fans to provide the cooling for components inside a VIO enclosure
• Two power supplies with universal AC input to provide power to the components in a VIO
enclosure
For each VIO enclosure to operate, at least one power supply in each VIO enclosure must be
operational. For fault tolerance, you must connect the power supplies in each VIO enclosure to
separate power distribution units (PDUs). For example, the power supplies located in slot 15
and slot 18 of each VIO enclosure cannot both be plugged into the left PDU.
The two VIO enclosures promote fault-tolerant configuration and servicing:
• Redundant hardware provides fault tolerance if it is divided between the two VIO enclosures.
• Fault-tolerant paths must be configured through the two VIO enclosures.
Because each VIO enclosure is a single module, two VIO enclosures are required to provide
fault-tolerant paths. The paths must be configured through both VIO enclosures. For example,
you could configure these paths through the Fibre Channel ports located on the two VIO
enclosures:
Slot.PortModuleGroupPath
1.102100Primary
1.103100Primary backup
1.203100Mirror
1.202100Mirror backup
These paths all exist within the same group. But they are divided between two VIO enclosures,
so the configuration is fault-tolerant. For additional information, see “Fibre Channel Devices”
(page 52).
Fibre Channel Disk Module
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. Using the four embedded
Fibre Channel ports on each VIO enclosure, you can daisy-chain together up to four FCDMs
with 14 disk drives in each FCDM for a maximum of 16 FCDMs.
Maintenance Switch
The HP ProCurve maintenance switch provides the communication between the Integrity NonStop
NS1200 system through the VIO enclosures, the optional UPS, and the system console running
HP NonStop Open System Management (OSM). For a general description of the maintenance
switch, refer to the NonStop NS14000 Planning Guide. Details about the use or implementation of
the maintenance switch that are specific to an Integrity NonStop NS1200 server are presented
here.
18 NonStop NS1200 System Overview