Compaq AA-RHGWC-TE manual BA356 Jumper and Terminator Module Identification Pins

Figure 9–8: BA356 Jumper and Terminator Module Identification Pins

Slot 6	Slot 1
Jumper	Jumper
Pin	Pin

Slot 6	Slot 1
Terminator	Terminator
Pin	Pin
	ZK-1529U-AI

9.3.2.2 UltraSCSI BA356 Storage Shelf

The UltraSCSI BA356 (DS-BA356-JF or DS-BA356-KH) has a single-ended, wide UltraSCSI bus. The DS-BA35X-DA personality module provides the interface between the internal, single-ended UltraSCSI bus segment and the shared, wide, differential UltraSCSI bus. The UltraSCSI BA356 uses a 180-watt power supply.

An older, non-UltraSCSI BA356 that has been retrofitted with a BA35X-HH 180-watt power supply and DS-BA35X-DA personality module is still only FCC certified for Fast 10 configurations (see Section 3.2.4 for a discussion on bus speed).

The UltraSCSI BA356 can hold up to seven StorageWorks building blocks (SBBs). These SBBs are UltraSCSI single-ended wide devices. The disk SCSI IDs are based upon the slot they are installed in. The S3 switches on the personality module (DS-BA35X-DA) determine whether the disks respond to SCSI IDs 0 through 6 (slot 7 is the power supply) or 8 through 14 (slot 15 is the power supply). To select SCSI IDs 0 through 6, set switches S3-1 through S3-7 to off. To select SCSI IDs 8 through 14, set personality module address switches S3-1 through S3-3 to on and switches S3-4 through S3-7 to off.

The jumper module is positioned behind slot 6 as with the non-UltraSCSI BA356 shown in Figure 9–7. For operation within a TruCluster Server cluster, you must install the J jumper. You verify the presence or absence of the jumper or terminator modules the same as for the non-UltraSCSI

Configurations Using External Termination or Radial Connections to Non-UltraSCSI Devices 9–13