Released in October 2019, it’s packed with plenty of new features Mac owners should love, like spreading cloud. Catalina is the latest build of Apple’s MacOS operating system, version 10.15.ORICO 5-Bay 3.5' USB3.0 to SATAIII External Hard Drive HDD Dock Enclosure for 5 x 3.5 inch HDD SSD Windows XP, Vista, 7, 8, 8.1, 10, Mac OS and Linux Compatibility-Black ( With RAID) Material: Aluminum / Plastic.The difference between the two is that RAID 4 stores parity information on a dedicated disk, while RAID 5 distributes the parity information. As with RAID 4, data is striped across the multiple component disks in the RAID at the block level. A RAID level that uses a combination of striping and parity to enhance the security of data storage.Mirroring generally runs at the speed of a single drive or a bit slower for writes (all drives can be written simultaneously, but there is some overhead). A RAID-1 mirror can be created in software with two or more independent drives, or via hardware such as a dual-drive unit like the OWC Mercury Elite Pro Dual.
