NonStop NS1000 Planning Guide (H06.05+)

Modular System Hardware

HP Integrity NonStop NS1000 Planning Guide—542527-004

5-11

Component Location and Identification

This illustration shows an example of connections between two IOAM enclosures and

an ESS via the separate Fibre Channel switch:

For fault tolerance, the primary and backup paths to an ESS logical device (LDEV)

must go through different Fibre Channel switches.

Some storage area procedures, such as reconfiguration, can cause the affected

switches to pause. If the pause is long enough, I/O failure occurs on all paths

connected to that switch. If both the primary and the backup paths are connected to

the same switch, the LDEV goes down.

Refer to the documentation that accompanies the ESS.

Component Location and Identification

Topics discussed in this subsection are:

The location and identification of a component in an Integrity NonStop NS1000 server

is similar to that of the Integrity NonStop NS-series server. For a general description of

the location and identification of components, refer to the NonStop NS-Series Planning

Guide. Details about the location and identification components that are specific to an

Integrity NonStop NS1000 server are presented here.

Topic Page

Terminology

5-12

Rack and Offset Physical Location 5-12

Blade Element Group-Module-Slot Numbering 5-12

IOAM Enclosure Group-Module-Slot Numbering 5-15

Fibre Channel Disk Module (FCDM) Group-Module-Slot Numbering 5-16

VST068.vsd

Fibre

Channel

Switch

ESS

IOA M

Enclosure

Fibre Channel

Switch

IOA M

Enclosure

FCSA