If a disk firmware bug causes I/o timeout, which of the following reliability technologies of OceanStor Dorado will take effect?

Question

Options

• AOnline diagnosis
• BFast reconstruction
• CQuick response to slow 1/0s
• DRAID reconstruction

• A
  2% (1)
• B
  12% (6)
• C
  83% (43)
• D
  4% (2)

Explanation

Option C is correct because a disk firmware bug that causes I/O timeouts produces slow or hanging I/O operations rather than an outright disk failure. OceanStor Dorado's "Quick response to slow I/Os" feature is specifically designed to detect disks that are responding abnormally slowly, isolate them, and reroute I/O requests to prevent application-level impact - which is exactly what this scenario describes.

Online diagnosis (A) is a general health-monitoring and fault-detection mechanism, not a real-time intervention for in-flight I/O timeouts. Fast reconstruction (B) and RAID reconstruction (D) both address what happens after a disk has already been declared failed and needs its data rebuilt from parity or mirrors; a firmware-induced timeout does not immediately mark a disk as failed, so neither reconstruction technology is triggered at that stage.

Memory tip: Think of the technologies in order of disk health - slow disk triggers "Quick response to slow I/Os," a fully failed disk triggers reconstruction. If the disk is slow but not dead, the slow I/O feature owns the response.

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