2 Cabling Storage Devices and Setting SCSI Addresses

Default Cabling Configuration (Non-Duplex)

 

External terminator

 

 

built into cable

SCSI Device

 

C11

Shelf

 

SCSI Device

 

 

 

68 to 50 pin

Shelf

 

 

 

adapter

 

 

Internal

 

 

terminator

 

 

 

C14

 

C20

 

SCSI A

SCSI B

 

SCSI C

SCSI D

 

 

C20

Hot Swap

 

Subsystem

Figure 2-4. Default Cabling Configuration (Non-Duplex)

 

Off

 

 

 

On

 

 

UPPER

 

 

 

CAGE

 

 

 

1

SCSI ID

 

2

 

 

 

3

ID

ID

ID

 

4

1

2

3

5

UPPER CAGE

 

6

 

 

 

 

LOWER

 

 

 

CAGE

 

 

 

1

ID

ID

ID

2

4

5

6

3

 

 

 

4

LOWER CAGE

 

5

 

 

 

6

 

 

 

The SCSI device shelves are on one SCSI channel; the hot-swap cages are on another channel. SCSI A may not be connected to a DAC card. SCSI B can be connected to a DAC card.

To change the SCSI addresses, see the “Setting SCSI Addresses” section. For internal cable part numbers, see the “Cabling Diagram Legend.”

The switch settings shown in the example are not the only acceptable settings.

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