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Figure 9–8: BA356 Jumper and Terminator Module Identification Pins
Slot 6
Jumper
Pin
Slot 6
Terminator
Pin
Slot 1
Jumper
Pin
Slot 1
Terminator
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