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NCP-MCI-5.20 · Question #255

A node has two SSDs in Slot0 and Slot 1. The SSD in Slot 1 fails. What is the result?

The correct answer is B. The CVM and other running VMs do not reboot, and the SSD capacity is reduced. With 2 SSD's, if slot 0 fails the Cvm reboots and will recover using slot1, vm rights/reads flow to other nodes while Cvm is restarting. If slot 1 fails, no Cvm reboot occurs but SSD capacity is reduced, missing blocks are retrieved from other nodes as needed and re protected…

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Question

A node has two SSDs in Slot0 and Slot 1. The SSD in Slot 1 fails. What is the result?

Options

  • AThe CVM reboots. Other running VMs do not reboot, and the SSD capacity is reduced.
  • BThe CVM and other running VMs do not reboot, and the SSD capacity is reduced.
  • CThe CVM is down. AHV takes over serving storage to the node, and the SSD capacity is reduced.
  • DThe CVM is down. Another CVM takes over serving storage to the node, and the SSD capacity is

How the community answered

(20 responses)
  • A
    5% (1)
  • B
    75% (15)
  • C
    15% (3)
  • D
    5% (1)

Explanation

With 2 SSD's, if slot 0 fails the Cvm reboots and will recover using slot1, vm rights/reads flow to other nodes while Cvm is restarting. If slot 1 fails, no Cvm reboot occurs but SSD capacity is reduced, missing blocks are retrieved from other nodes as needed and re protected. If both SSD's fail, the Cvm is down and all read/writes are done to other nodes. https://next.nutanix.com/server-virtualization-27/impact-of-ssd-failure-19417

Topics

#SSD failure#CVM behavior#storage resiliency#disk slot

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