S2D Fault Tolerance - Three way mirror - Disk failures

M

Markus_95

Hello together,

I am quiet new to S2D and I have one question regarding the fault tolerance in a three way mirror when we have f.e. 4 nodes in a Cluster.

In this MC article they say, that a volume will be set to offline, when simultaneously in three Nodes a disk fails.

Fault tolerance and storage efficiency in Storage Spaces Direct

I do not really understand why it is like this. In another article I read that even in a 8 node Cluster the volume will be set to offline when one disk in three different nodes Fails at the same time.

Lets assume the following:

Slab copy 1 --> Node 1 drive 5
Slab copy 2 --> Node 2 drive 3
Slab copy 3 --> Node 4 drive 1

When drive 5 in node 1 and drive 3 in node 2 will fail the volume is still available in a three way mirror.
But what will happen, when a disk in node 3 will also fail at the same time.
Does the volume really goes offline, even when the slab copy in node 4 drive 1 is still available?

Thanks for any information :)

Greets,
Markus

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