Internal SCSI setup: when adding a second SCSI hard disk, where should the second drive be connected on the bus?

Introduction / Context:
SCSI (Small Computer System Interface) devices are attached in a daisy-chain topology. Understanding physical connections and termination is essential for stable operation and proper device detection.

Given Data / Assumptions:

• Two internal SCSI hard disks are being attached.
• A host adapter (controller) already exists in the system.
• Standard internal ribbon with multiple 50-pin/68-pin connectors depending on SCSI type.

Concept / Approach:
SCSI devices share a common bus. Internal devices chain together via available SCSI connectors on the cable or on the drive. Each device requires a unique SCSI ID, and the bus must be terminated at both physical ends (not in the middle). Thus, adding a second drive typically means connecting it to an available SCSI connector on the cable or to an open pass-through connector on the first drive (depending on hardware), keeping the daisy-chain intact.

Step-by-Step Solution:

Verification / Alternative check:
Run the SCSI utility at boot to confirm both devices enumerate correctly with distinct IDs and proper termination detected.

Why Other Options Are Wrong:

• Any open SCSI port on the computer: Internal chains use the internal bus, not miscellaneous external ports.
• Serial or parallel ports: Not part of SCSI bus; incompatible electrically and logically.
• None of the above: The daisy-chain connection is correct.

Common Pitfalls:
Duplicate SCSI IDs, enabling termination on a middle device, or mixing cable types that do not match signaling standards (SE/LVD).

Final Answer:
An open SCSI port on the first hard drive