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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-LC fibre-channel cables .................61
Connecting an LC-LC cable to an SFP module ...........62
Removing an LC-LC fibre-channel cable .............64
Using LC-SC fibre-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
iv IBM System Storage DS4700 Express Storage Subsystem: Installation, User’s and Maintenance Guide