The steps for specifying a disk for deployment must be added to the RHOSP 9 Bare Metal Provisioning guide. This includes mentioning that a suitable disk device can be found by using its name or path (or by other identifiers).
See http://docs.openstack.org/project-install-guide/baremetal/draft/advanced.html#specifying-the-disk-for-deployment-root-device-hints for an upstream example.
Assigning to Sandra for review.
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