Amazon.com: Cenmate 2 Bay External Hard Drive RAID Enclosure for 2.5/3.5" SATA HDD/SSD with USB A/C 3.0+eSATA Cable, Hard Drive Reader Support 40TB Capacity, RAID 0/RAID 1/Normal/JBOD, Max 6Gbps : Electronics
Redundant Array of Inexpensive Disks”. CONTENTS Storage devices. Optical drives. Floppy disk. Hard disk. Components of Hard disks. RAID technology. Levels. - ppt download