Some SAS3 Host Bus Adapters (HBA) with hardware RAID support might include an option to enable JBOD mode. JBOD mode allows the operating system to access a disk directly without first creating a RAID volume on it. If JBOD mode is not enabled, the operating system is not able to see the disk until the disk is included in a RAID volume.
raidconfig man page incorrectly states that JBOD mode supported on the Oracle Storage 12 Gb SAS RAID PCIe HBA (Internal). The only way to confirm if JBOD mode is supported for your HBA is to check to see if the HBA documentation says that it's supported.