What are two valid back-end SAS cable connections on a VSP midrange system? (Choose two.)

Question

Options

• Afrom DKA to DKB
• Bfrom ENC to ENC
• Cfrom DKB to ENC
• Dfrom DKA to SSW

• A
  82% (14)
• B
  6% (1)
• D
  12% (2)

Explanation

On a VSP midrange system, valid back-end SAS cable connections include DKA to DKB (A) - an inter-adapter cross-connection that provides redundant path availability between the two disk adapter modules - and DKB to ENC (C), which represents the standard controller-to-enclosure link that delivers I/O from a disk adapter to a drive shelf.

Option B (ENC to ENC) is incorrect because drive enclosures are passive endpoints in the back-end SAS topology; they receive connections from disk adapters, not from one another - daisy-chaining enclosures directly would bypass the controller and isn't a supported configuration. Option D (DKA to SSW) is incorrect because SSW (a switching component) is not a valid SAS back-end target; back-end SAS cabling terminates at enclosures (ENC) or the paired adapter (DKB), not at a switch module.

Memory tip: Think of the back-end SAS path as flowing from controllers to storage - DKA/DKB are the controllers, ENC is the storage shelf. Valid cables either connect the two controllers to each other (DKA↔DKB) or connect a controller to a shelf (DK_→ENC). Anything else (ENC↔ENC, DK_→SSW) breaks that pattern.

No community discussion yet for this question.