Storage Spaces Direct is the most unreliable, non highly-available high-availability solution Microsoft have ever released! We purchased a fully validated S2D solution from Dell and in two years since we put it in we have had:
> Total Cluster Failure with complete loss of data on CSV's requiring a full rebuild from scratch and complete DR of over 200 virtual machines!
> Hosts crashing during routine patching due to differences in the binaries causing CSVs to go offline and VMs to crash
> Bug after bug.
> To fix the issues that were introduced in the May 2018 UR that in itself is a massive risk to install October UR that fixes it as during the patching cycle to install the Oct 2018 UR expect to see the loss of storage.
> There are still some serious bugs in S2D that Microsoft have been unable to fix and still no news.
> We have been advised by Dell that to patch S2D at present they for all customers they do not recommend carrying this out online and to either shutdown all VM roles on the cluster and patch or migrate all roles off the cluster to patch.
WTF!
Microsoft Partner