OVF Template Failing To Deploy

When trying to deploy an exported OVF template into another vCenter and cluster, I was presented with a strange error which seemed to indicate that I’d not specified which datastore to deploy to, which was odd because I most certainly had. The error I saw is below;

Failed to deploy OVF package. ThrowableProxy.cause A specified parameter was not correct: Target datastore must be specified in order to deploy the OVF template to the vSphere DRS disabled cluster

A quick Google search for this gave nothing, which is usually a bad sign, but the fix for this was rather simple, when presented with the storage you want to deploy to and you pick the relevant datastore;

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If you then go and click on advanced, you’ll find that only one of the disk groups has been allocated to the datastore you picked for some reason;

If you then click edit on the disk group that doesn’t have a datastore, you should then be able to pick a datastore for that and the OVF will then deploy. This was all seen on vCenter 6.5 Update 2 (build 6.5.0.20000) but it may affect other vCenter versions.