Classifying a SCSI Host Adapter A SCSI host adapter card is best categorized as which type of field-replaceable unit (FRU)?

Introduction / Context:
SCSI host adapters (HBAs) connect the system bus to SCSI devices such as disks, tapes, and scanners. Correctly identifying their category simplifies inventory and replacement decisions in the field.

Given Data / Assumptions:

• SCSI HBAs are plug-in expansion cards.
• They provide input/output services between the host and peripherals.
• They are replaced as discrete cards during service.

Concept / Approach:

By function and form, a SCSI HBA is an I/O controller card. It is not a CPU (processor), not a display adapter (video card), and not a storage device (hard drive). Therefore, classifying it as an I/O card is accurate and aligns with service documentation.

Step-by-Step Solution:

Verification / Alternative check:

OS device managers list SCSI controllers under “Storage controllers” or “SCSI/RAID controllers,” confirming their I/O function and swappable nature.

Why Other Options Are Wrong:

CPU, video card, and hard drive are distinct classes. The SCSI adapter is none of these.

Common Pitfalls:

Confusing an I/O controller with a storage device because both relate to disks; the adapter controls, the drive stores.

Final Answer:

I/O card