Sys Ops Module 2 Exam Study Guide with Complete Solutions

Sys Ops Module 2 Exam Study Guide with Complete Solutions Serial Advanced Technology Attachment (SATA) - Correct Answer A hard drive interface providing faster transfer times, thinner more flexible cabling, and easier plug-and-play connections Network Attached Storage (NAS) - Correct Answer A specialized storage device or group of storage devices providing centralized fault tolerant data storage for a network, not attached to the server. Differs from RAID in it maintains its own interface to the LAN rather than relying on a server to connect it to the network and control its functions. Storage Area Network (SAN) - Correct Answer A specialized high-speed network of storage devices and switches connected to servers or computer systems. It presents a shared pool of storage devices to multiple servers. Redundant Array of Independent Disks (RAID) - Correct Answer It not only has increased our capabilities to store and retrieve data, but also to limit data loss caused by hardware failure (i.e. fault tolerance) RAID 0 - Correct Answer Disk Striping (Block-by-Block) - No Parity or Mirroring - Data is split evenly across two or more disks - Easiest to implement - NOT fault-tolerant RAID 1 - Correct Answer Disk Mirroring/Duplexing (Block-by-Block) - Data on one disk is copied to the other - Ensures fault tolerance - Two physical hard disks to form one virtual hard disk by mirroring the data RAID 5 - Correct Answer Disk Striping with Distributed Parity (Block-Level) - Distributed parity removes bottleneck of dedicated parity - High capacity & cost-efficient - Both data and parity information are striped across three or more drives - Not efficient with large data transfer RAID 6 - Correct Answer Disk Striping with Dual Distributed Parity (Block-Level) - Two parity blocks instead of one - When writing data it requires a larger amount of time - Can handle large data tra