TAILIEUCHUNG - Introduction to Computing (15)
CSC to Computing Lecture 15 Dr. Iftikhar Azim Niaz. ianiaz@. 1Last Lecture Summary Hard Disk Controllers. q SATA. q EIDE. q SCSI and. q External and Removable Hard RAID and Online Zip Tape Drive 2 Last Lecture Summary Optical How a Laser Reads CD-ROM, CD-R, CD-RW,.n PhotoCD, Archive DVD ROM, DVR+/-R, DVD-RW, Drive speed and Writing Care of Optical Discs 3 Solid State Storage Data is stored physically using uses integrated circuit assemblies as memory. to store data persistentlyn No magnets or Very fast data transfer. 4 Solid State Storage Byte for byte, standard magnetic or optical. storage is less expensive and more reliable. than solid-state Memory devices can move data in much less. time than any mechanical storage device. q solid-state devices have no moving parts and. q store data electronically (the way it is used by the. CPU)n Unlike standard devices, solid-state devices do. not need to move ahead or sensor to find data. or to convert it from magnetic or optical form. into electronic form. 5 Solid State A storage device that typically uses flash. memory to store data, instructions, and. Available form factors of ”in, in, and Used in all types of computers including. q servers, desktop computers, and mobile computers. q portable media players and digital video Storage capacities range from 16 GB to 256 GB. and more. 6 Solid State Solid State Drives (SSDs) have several. advantages over magnetic hard disks:. 7SSD vs HDD. 89 Flash Memory Type of nonvolatile memory that can. be erased electronically and. rewrittenn Long term updateable Contains no moving parts makes. them. q more durable and shock resistant. q than magnetic hard disks or optical. discsn Found in cameras and USB Combination of RAM and ROM. 10 Flash Memory A memory card is a removable flash memory. device that you insert and remove from a slot in. a computer, mobile device, or card. reader/writer. 11Flash Memory Storage. 12Flash Memory Storage. 13 Compact used in portable electronic Type I ( mm thick) and the thicker Type II. (CF2) cards (5 mm thick).n 2 MB to 128 Compact Flash IDE (ATA) speed is usually. specified in "x" ratings, . 8x, 20x, 133x. q 133x rating means transfer speed of:. q 133 * 150 KByte/s = 19,950 KByte/s. q ~ 20 MBps. 14 Smart a flash memory card standard owned by. capacities ranging from 2 MB to 128 MBn Data transfer rate: 2MB/ 1,000,000 write 10 year storage time without No longer manufactured 15 Multi Media Card (MMC).n About the size of a postage used mostly for a portable Sizes up to and including 128 MMC, RS-MMC, MMCplus, Data transfer. q MMC 20Mbps. q RS-MMC20Mbps. q MMC mobile 20 Mbps. q MMC Plus more or less superseded by SD (Secure. Digital) card, 1
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