Home » NCM-MCI » What is the effect of simultaneous disk failures on two nodes located in block A?
A Nutanix cluster is deployed with the following configuration:
Three four-node blocks (A, B, and C)
All Flash Redundancy Factor 2
What is the effect of simultaneous disk failures on two nodes located in block A?
A. VMs are migrated of the nodes with disk failures.
B. Each node with a failed disk is marked as degraded.
C. VM read and write operations continue normally.
D. VMs on the nodes with failed disks are unable to write data
Correct Answer: C
Explanation/Reference:
Explanation:
Dual Disks Failures:
With Replication Factor = 2, we have two copies of each data block. Also, with a 4TB Disk which is only 1TB utilized, we will have 1TB worth of blocks/data across the cluster (shorter rebuild times as we factor in the capacity utilized) – plus with AOS proactive disk alerting, so, unless two disks are pulled at the same time, this can be a very rare occurrence of two drives failing at the same time.
Reference:
https://next.nutanix.com/prism-infrastructure-management-26/nutanix-fault-tolerance-question-33903
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