Thanks for the response, i think my array is linear, although i am not 100% sure. I did not setup this array, a previous admin did so and i am inherititing this device to manage, needless to say i dont have much experience with it. Is there a way to tell between and linear and a virtual array from the admin console? The volume is denoted by a vd prefix in its name.
Jus to follow on from this, after review the doc you linked to, would my issue be that it has snap pools attached to the volume preventing the expansion? If that is the case, what would my options be for expansion?