What is the correct procedure to replace a suspected SAS interface cable connected to the last drive box (DBL) of a Hitachi Unified Storage system?

Question

Options

• AReplace the suspected SAS interface cable by a new one.
• BUsing SNM2, disable the suspected SAS link, replace the cable and enable the SAS link.
• CUsing the WEB tool, disable the suspected SAS link, replace the cable and enable the SAS link.
• DSlide out the I/O module from the DBL, replace the cable and slide the I/O module back in.

• A
  9% (4)
• B
  2% (1)
• C
  5% (2)
• D
  84% (36)

Explanation

On the Hitachi Unified Storage platform, the last drive box (DBL) in a SAS chain requires physical access to its I/O module before any cable replacement - you slide out the I/O module, swap the cable, and slide it back in, because the DBL's cabling architecture is managed at the hardware level through that module, not through software tools.

Why the distractors are wrong:

• A is wrong because simply swapping the cable without first removing the I/O module risks damaging connectors or disrupting the SAS chain improperly.
• B is wrong because SNM2 (Storage Navigator Modular 2) is used for logical configuration tasks, not for managing physical SAS link maintenance on a DBL.
• C is wrong for the same reason - the WEB tool handles storage management functions, not the physical cable replacement procedure for a DBL specifically.

Memory tip: Think of the DBL as a drawer - you have to pull the drawer out (slide the I/O module) before you can reach what's inside. The key word in the question is "last drive box," which signals a hardware-only procedure, not a software-controlled one - no software tool (SNM2 or WEB) governs this physical step.

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