A rescan removes the CD-ROM drives from the service console kernel configuration and does not restore the configuration, which leaves the devices inaccessible from the service console.
As a workaround, you can manually add the missing CD-ROM drive to the service console after the rescan is finished.
To do this, complete the following steps:
Note: This problem occurs each time you rescan your storage devices and requires that you perform the workaround procedure afterwards.
Based on VMware KB 1006943