Lately, I’ve received some comments why I don’t include SIOC in my articles when talking about space load balancing. Well, Storage DRS only enables SIOC on each datastore inside the datastore cluster if I/O load balancing is enabled. When you don’t enable I/O load balancing during the initial setup of the datastore cluster, SIOC is left disabled.
Keep in mind when I/O load balancing is enabled on the datastore cluster and you disable the I/O load balancing feature, SIOC remains enabled on all datastores within the cluster.
Storage DRS enables SIOC on datastores only if I/O load balancing is enabled
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