tailieunhanh - Lecture Introduction to computing - Lecture 15

In this lesson you will learn about the types of operating systems and the services they provide. Then you will learn about some of the enhancements you can make to your OS using utility software. | CSC 101 Introduction to Computing Lecture 15 Dr. Iftikhar Azim Niaz ianiaz@ 1 1 Last Lecture Summary I Hard Disk Controllers SATA EIDE SCSI and SAS External and Removable Hard disks RAID and Online Storage Zip Disk Tape Drive 2 2 Last Lecture Summary II Optical Discs How a Laser Reads Data CD-ROM, CD-R, CD-RW, PhotoCD, Archive CD DVD ROM, DVR+/-R, DVD-RW, DVD-RAM Drive speed and Writing time Care of Optical Discs 3 Solid State Storage Devices Data is stored physically using switches uses integrated circuit assemblies as memory to store data persistently. No magnets or laser Very fast data transfer 4 Solid State Storage Devices Byte for byte, standard magnetic or optical storage is less expensive and more reliable than solid-state storage Memory devices can move data in much less time than any mechanical storage device solid-state devices have no moving parts and store data electronically (the way it is used by the CPU). 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 Drive A storage device that typically uses flash memory to store data, instructions, and information Available form factors of ”in, in, and in Used in all types of computers including servers, desktop computers, and mobile computers portable media players and digital video cameras Storage capacities range from 16 GB to 256 GB and more Solid State Drives Solid State Drives (SSDs) have several advantages over magnetic hard disks: SSD vs HDD Flash Memory Storage Type of nonvolatile memory that can be erased electronically and rewritten. Long term updateable storage Contains no moving parts makes them more durable and shock resistant than magnetic hard disks or optical discs. Found in cameras and USB drives Combination of RAM and ROM 10 Flash Memory Storage A memory card is a removable flash memory device that you insert and remove from a slot in a . | CSC 101 Introduction to Computing Lecture 15 Dr. Iftikhar Azim Niaz ianiaz@ 1 1 Last Lecture Summary I Hard Disk Controllers SATA EIDE SCSI and SAS External and Removable Hard disks RAID and Online Storage Zip Disk Tape Drive 2 2 Last Lecture Summary II Optical Discs How a Laser Reads Data CD-ROM, CD-R, CD-RW, PhotoCD, Archive CD DVD ROM, DVR+/-R, DVD-RW, DVD-RAM Drive speed and Writing time Care of Optical Discs 3 Solid State Storage Devices Data is stored physically using switches uses integrated circuit assemblies as memory to store data persistently. No magnets or laser Very fast data transfer 4 Solid State Storage Devices Byte for byte, standard magnetic or optical storage is less expensive and more reliable than solid-state storage Memory devices can move data in much less time than any mechanical storage device solid-state devices have no moving parts and store data electronically (the way it is used by the CPU). Unlike standard devices, solid-state devices do .

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• Computer systems
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