Fabric Switch: It’s a device which interconnects multiple network devices. There are switches starting from 16 port to 32 ports which connect 16 or 32 machine nodes etc. Vendors who manufacture these kind of switches are brocade, McData.
FC Controllers: These are Data transfer medias they will sit on PCI slots of server, you can configure Arrays and volumes on it.
JBOD: Just bunch of Disks is Storage Box, it consists of enclosure where set of hard drives are hosted in many combinations such SCSI drives, SAS, FC, SATA.