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SCSI bus (cable and BA356) under the 3-meter limit to still allow high
speed operation.
If you are using a DWZZB-VW, install it in slot 0 of the BA356.
9.4.1.3 Preparing an UltraSCSI BA356 Storage Shelf for a TruCluster Configuration
An UltraSCSI BA356 storage shelf is connected to a shared UltraSCSI bus,
and provides access to UltraSCSI devices on the internal, single-ended and
wide UltraSCSI bus. The interface between the buses is the DS-BA35X-DA
personality module installed in the UltraSCSI BA356.
To prepare an UltraSCSI BA356 storage shelf for usage on a shared SCSI
bus, follow these steps:
1. Ensure that the BA35X-MJ jumper module is installed behind slot 6
(see Section 9.3.2.1, Figure 9–7, and Figure 9–8).
2. Set the SCSI bus ID switches on the UltraSCSI BA356 personality
module (DS-BA35X-DA, Figure 9–3) as follows:
• If the UltraSCSI BA356 is to house disks with SCSI IDs in the
range of 0 through 6, set the personality module address switches
S3-1 through S3-7 to OFF.
• If the UltraSCSI BA356 is to house disks with SCSI IDs in the
range of 8 through 14, set personality module address switches S3-1
through S3-3 to ON and switches S3-4 through S3-7 to OFF.
3. Disable the UltraSCSI BA356 differential termination. Ensure that
personality module (DS-BA35X-DA) switch pack 4 switches S4-1 and
S4-2 are ON (see Figure 9–3).
____________________ Note _____________________
S4-3 and S4-4 are not used on the DS-BA35X-DA.
9.4.2 Connecting Storage Shelves Together
Section 9.4.1 covered the steps necessary to prepare the BA350, BA356, and
UltraSCSI BA356 storage shelves for use on a shared SCSI bus. However,
you will probably need more storage than one storage shelf can provide, so
you will need two storage shelves on the shared SCSI bus.
______________________ Note _______________________
Because the BA350 contains a narrow (8-bit), single-ended SCSI
bus, it only supports SCSI IDs 0 through 7. Therefore, a BA350
Configurations Using External Termination or Radial Connections to
Non-UltraSCSI Devices 9–17