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Subsystem.

Table 29. Description of Figure 78

Number Description

1 DS4700 Express Storage Subsystem

2 EXP100

3 EXP810

4 EXP710

Storage expansion enclosure settings

This section provides information about storage expansion enclosure settings. For

additional detail, refer to the Installation, User's, and Maintenance Guide for your

storage expansion enclosure.

Fibre channel loop and ID settings

When you install an E-DDM in the storage expansion enclosure, the E-DDM tray

plugs into a printed circuit board called the midplane. The midplane sets the fibre

channel loop ID automatically, based on the enclosure ID switch setting and the

physical location (bay) of the E-DDM.

DS4000 storage expansion enclosure ID settings

Some DS4000 storage expansion enclosures, such as the EXP710 and EXP100,

have an enclosure ID switch that is used to identify the DS4000 storage expansion

enclosure on a fibre channel loop. The enclosure ID switch is located on the back

of the unit. Other DS4000 storage expansion enclosures, such as the EXP810, do

not have an enclosure ID switch because the controller automatically sets the

enclosure ID number.

2 2

ds470102

DS4700 Express

EXP100

EXP810

EXP710

Figure 78. Cabling variations when intermixing EXP100, EXP710, and EXP810 storage expansion enclosures behind a

DS4700 Express Storage Subsystem

Chapter 3. Cabling the storage subsystem 97

IBM DS4700 Service Manual

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