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openstack san fc storage ?

Hi,

Im coming from vmware and hyper-v world. In hyper-v and vmworld every host/compute have access direct/connect to block storage using fc, in openstack world theres is cinder, my question is does every compute node to access storage first must through cinder first, then cinder connect to fc storage ? I mean if my vmware/hyper-v server already have HBA connect direct to storage and then im moving to openstack that hba became useless, or in openstack compute node does need hba ?

Thx