What is the interconnection protocol between the OceanStor Dorado controller enclosure and the smart disk enclosure?

Question

Options

• AFC
• BSAS
• CPCle
• D100GE RoCE

• A
  4% (1)
• B
  4% (1)
• C
  8% (2)
• D
  84% (21)

Explanation

Option D (100GE RoCE) is correct because the OceanStor Dorado's smart disk enclosure houses NVMe SSDs and communicates with the controller enclosure using NVMe over Fabrics (NVMe-oF) via 100GE RoCE - a high-bandwidth, ultra-low-latency RDMA-capable Ethernet protocol that matches the performance tier of all-flash NVMe storage.

Why the distractors are wrong:

• A (FC): Fibre Channel is a host-facing SAN protocol used to connect servers to storage arrays, not for internal enclosure-to-enclosure links.
• B (SAS): SAS is used in Dorado's traditional (non-smart) disk enclosures with SAS/SSD drives, but the smart disk enclosure is NVMe-based and requires a faster fabric.
• C (PCIe): PCIe operates within a single enclosure (e.g., connecting an NVMe SSD to a local controller), not across separate physical enclosures.

Memory tip: Think "smart = NVMe = fabric." Smart disk enclosures are NVMe-native, so they need an NVMe-oF fabric - and on the Dorado, that fabric is 100GE RoCE. If it were a legacy SAS disk enclosure, SAS would be your answer; the word "smart" is your signal to pick the faster protocol.

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