Which module is unique to the Hitachi Unified Storage (HUS) model 150?

Question

Options

• ACache Module to expand memory
• BI/O Module for host interface options
• CBattery Module to increase backup duration
• DSSD Module to support cache backup

• A
  4% (1)
• B
  92% (22)
• C
  4% (1)

Explanation

Option B is correct because the HUS 150 uniquely incorporates a dedicated I/O Module that allows flexible host interface configurations - this modular I/O design is a distinguishing architectural feature of that specific model, enabling it to support varied connectivity options not found in the same form across other HUS variants.

Why the distractors are wrong:

• A (Cache Module): Expanding memory via cache modules is a common capability across many storage platforms, not exclusive to the HUS 150.
• C (Battery Module): Battery backup units for cache protection are standard across most enterprise storage arrays and are not uniquely associated with the HUS 150.
• D (SSD Module for cache backup): Cache backup via SSD is a feature found in various storage systems (including other HUS models) and is not a HUS 150-exclusive design element.

Memory tip: Associate "HUS 150" with "I/O" - both contain the number/letter concept of input/output flexibility. The HUS 150's claim to fame in exam questions is its modular host interface, so when you see "unique to HUS 150," think connectivity flexibility via I/O Module.

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