Electrical requirements . . . . . . . . . . . . . . . . . . . . . 26

Power and site wiring requirements for models with ac power supply and

 

 

fan units

.

27

Power and site wiring requirements for models with dc power supply and

 

 

fan units

.

28

Heat output, airflow, and cooling

.

28

Chapter 2. Installing the storage subsystem

.

31

Installation overview

. . . . . . . . .

. .

.

31

Handling static-sensitive devices

. . . . . . . . .

. .

.

33

Preparing for installation

. . . . . . . . .

. .

. .

.

34

Tools and hardware required

. . . . . . . . .

. .

. .

.

35

Preparing the site . . . . . . . . . . . . . . . . . . . . . . . 35

Preparing the rack cabinet

. . . . . . . . .

. .

. .

.

36

Installing the support rails

. . . . . . . . .

. .

. .

.

36

Installing the DS4700 Express

. . . . . . . . .

. .

. .

.

40

Removing the CRUs . . . . . . . . . . . . . . . . . . . . . . 40 Removing a controller . . . . . . . . . . . . . . . . . . . . 41

Removing an ac power supply and fan unit

. . . .

.

.

42

Removing a dc power supply and fan unit

. . . .

.

.

43

Removing an E-DDM

. . . .

.

.

45

Installing the DS4700 Express into a rack on the support rails

. . . .

.

.

46

Replacing the components

. . . . . . 48

Replacing a controller . . . . . . . . . . . . . . . . . . . . 48

Replacing an ac power supply and fan unit

. . . .

.

.

49

Replacing a dc power supply and fan unit

. . . .

.

.

50

Replacing an E-DDM

. . . .

.

.

52

Installing a Telco bezel

. . . .

.

.

53

Chapter 3. Cabling the storage subsystem

. . . .

.

.

55

Enclosure ID settings

. . . .

.

.

55

Fibre-channel loop and ID settings

. . . .

.

.

56

Working with SFPs and fiber-optic cables

. . . .

.

.

56

Handling fibre-optic cables

. . . .

.

.

57

Installing SFP modules . . . . . . . . . . . . . . . . . . . . . 58

Removing SFP modules

.

.

60

Using LC-LCfibre-channel cables

.

.

61

Connecting an LC-LC cable to an SFP module

.

.

62

Removing an LC-LCfibre-channel cable

.

.

64

Using LC-SCfibre-channel cable adapters

.

.

64

Connecting an LC-SC cable adapter to a device

.

.

65

Removing an LC-LC cable from an LC-SC cable adapter

.

. 66

Connecting storage expansion enclosures to the DS4700 Express . . . .

.

.

68

Redundant drive channel pair

.

.

68

Overview of steps to connect storage expansion enclosures to a storage subsystem. . . . . . . . . . . . . . . . . . . . . . . . . 69

DS4700 Express Storage Subsystem drive cabling topologies . . .

. .

.

70

One DS4700 Express and one storage expansion enclosure . . .

. .

. 72

One DS4700 Express and two storage expansion enclosures. . .

. .

. 72

One DS4700 Express and three storage expansion enclosures . .

. .

. 74

One DS4700 Express and four storage expansion enclosures . .

. .

.

74

One DS4700 Express and up to six storage expansion enclosures . . . . 74

One DS4700 Express and two or more storage expansion enclosures in a

 

 

mixed configuration

. . . . . . . . .

. . .

.

76

DS4700 Express Storage Subsystem and supported storage expansion

 

 

enclosure drive cabling schemes . . .

. . . . . . . . .

. . .

.

77

ivIBM System Storage DS4700 Express Storage Subsystem: Installation, User’s and Maintenance Guide

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IBM DS4700 manual Installing the storage subsystem, Cabling the storage subsystem