3(a)What are the major factors to be taken into account when considering what storage requirements are necessary for Multimedia Systems? Major factors Large volume of date Real time delive Data format Storage medium Retrieval mechanisms 4 MARKS---Unseen/applied bookwork (b) What is RAID technology and what advantages does it offer as a medium for the storage and delivery of large data? RAID--- Redundant Array of Inexpensive Disks Offers. Affordable alternative to mass storage High throughput and reliability RAID System Set of disk drives viewed by user as one or more logical drives Data may be distributed across drives Redundancy added in order to allow for disk failure 4 MARKS--BOOKWORK (c) Briefly explain the eight levels of RAlD functionality Level 0- Disk Striping---distributing data across multiple drives Level 1-Disk Mirroring ---Fault tolerancing Level 2- Bit Interleaving and HEC Parity Level 3- Bit Interleaving with XOR Parity Level 4- Block Interleaving with XOR Parity Level 5-block Interleaving with Parity Distribution Level 6- Fault Tolerant System Error recovery Level 7-Heterogeneuos System--- Fast access across whole system 8 MARKS--- BOOKWORK (d) a digital video file is 40 Mb in size. The disk subsystem has four drives and the controller is designed to support read and write onto each drive, concurrently. The digital video stored using the disk striping concept. A block size of 8 Kb is used for each 1/0 operation3 (a) What are the major factors to be taken into account when considering what storage requirements are necessary for Multimedia Systems? Major factors: Large volume of date Real time delivery Data format Storage Medium Retrieval mechanisms 4 MARKS --- Unseen/applied bookwork (b) What is RAID technology and what advantages does it offer as a medium for the storage and delivery of large data? RAID --- Redundant Array of Inexpensive Disks Offers: Affordable alternative to mass storage High throughput and reliability RAID System: Set of disk drives viewed by user as one or more logical drives Data may be distributed across drives Redundancy added in order to allow for disk failure 4 MARKS --- BOOKWORK (c) Briefly explain the eight levels of RAID functionality . Level 0 – Disk Striping --- distributing data across multiple drives Level 1 – Disk Mirroring --- Fault tolerancing Level 2 – Bit Interleaving and HEC Parity Level 3 - Bit Interleaving with XOR Parity Level 4 – Block Interleaving with XOR Parity Level 5 - Block Interleaving with Parity Distribution Level 6 – Fault Tolerant System --- Error recovery Level 7 – Heterogeneuos System --- Fast access across whole system 8 MARKS --- BOOKWORK (d) A digital video file is 40 Mb in size. The disk subsystem has four drives and the controller is designed to support read and write onto each drive, concurrently. The digital video stored using the disk striping concept. A block size of 8 Kb is used for each I/O operation