Power and site wiring requirements ...............23
Heat output, airflow, and cooling .................24
Chapter 2. Installing the storage subsystem .............27
Installation overview .......................27
Handling static-sensitive devices ..................29
Preparing for installation .....................29
Toolsand hardware required ...................31
Preparing the site .......................31
Preparing the rack cabinet....................32
Installing the support rails .....................32
Installing the DS5020 ......................36
Removing the CRUs......................36
Removing a controller ....................37
Removing an ac power supply and fan unit ............38
Removing an E-DDM ....................39
Installing the DS5020 into a rack on the support rails..........40
Replacing the components ...................42
Replacing a controller ....................42
Replacing an ac power supply and fan unit ............43
Replacing an E-DDM ....................44
Chapter 3. Cabling the storage subsystem..............45
Enclosure ID settings ......................45
Fibre Channel loop and ID settings .................46
Working with SFPs and fiber-optic cables ...............46
Handling fiber-optic cables ...................47
Installing SFP modules .....................48
Removing SFP modules ....................50
Using LC-LC Fibre Channel cables ................51
Connecting an LC-LC cable to an SFP module ...........52
Removing an LC-LC Fibre Channel cable .............54
Connecting storage expansion enclosures to the DS5020 .........54
Redundant drive channel pair ..................55
Overview of steps to connect storage expansion enclosures to a storage
subsystem.........................56
DS5020 storage subsystem drive cabling topologies ..........57
One DS5020 and one storage expansion enclosure .........59
One DS5020 and two storage expansion enclosures .........60
One DS5020 and three storage expansion enclosures ........62
One DS5020 and four storage expansion enclosures.........63
One DS5020 and up to six storage expansion enclosures .......64
One DS5020 and two or more storage expansion enclosures in a mixed
configuration .......................66
DS5020 storage subsystem and supported storage expansion enclosure drive
cabling schemes ......................67
DS5020 storage subsystem drive cabling rules ...........67
One DS5020 and one EXP520 storage expansion enclosure ......70
One DS5020 and two EXP520 storage expansion enclosures......71
One DS5020 and three or more EXP520 storage expansion enclosures 72
Storage expansion enclosure settings ...............78
Fibre Channel loop and ID settings ...............78
Storage expansion enclosure ID settings .............78
Connecting secondary interface cables ................78
Configuring the storage subsystem .................79
Storage subsystem management methods..............80
iv IBM System Storage DS5020 Storage Subsystem: Installation, User’s, and Maintenance Guide