Juana Ortiz-Valadez
Juana Ortiz-ValadezChapter 7 PowerPoint SolutionsCompare primary storage and secondary storage, and discuss the most important characteristics of secondary storage.Primary storage is an essential in every computer because if gives a computer the ability to save and store information. RAM is another word for primary storage.Secondary storage provides permanent storage; hard-disk drive, data and programs can be retained after the computer has been shut off.The most important characteristics of secondary storage include media, capacity, storage devices, and access speed.Discuss hard disks including density, platters, tracks, sectors, cylinders, head crashes, internal, external, and performance enhancements.Hard disks are used to save files by altering the magnetic charges of the disks surface to represent 1s and 0s. They retrieve data and programs by reading the changes from a magnetic disk.Density is referred to the tightness of the charges that can be packed next to one another on the disk. Hard disks use rigid metallic platters that are stacked on top of another. Tracks, sectors and cylinders are used by hard disks to store and organize files. Head crashed occurs when a read/write head makes contact with the hard disks surface or with particles of the surface. An internal hard disk is inside of the system unit that are able to store and retrieve large quantities of information. External hard drives have a fixed amount of storage and is a removable hard disk. Performance enhancements have three ways to improve the performance of the hard disks; disk caching, redundant arrays of inexpensive disks, and file compression/decompression.Discuss optical disks including pits, lands, CDs, DVDs, Blu-ray, and hi def.Optical discs use a laser beam to alter the surface of the disc to represent data. Optical discs use optical light for 1s and 0s as flat areas called lands and the bumpy areas called puts on the surface of the disc. CDs were the first widely used for PC users, and can store 700 MB. DVDs have more data than a CD and are used for watching something; they are read only, write once, and sometimes rewritable.Todays generation of an optical disc is high definition used on a Blue-ray disc.Discuss solid-state storage including solid-state drives, flash memory, and USB drives.Solid-state storage devices do not have any moving parts. Solid-state drives were designed to be connected inside a personal computer system the same way an internal hard disk to contain the memory instead of the magnetic disks to store date. Flash memory cards are small solid state storage devices used mainly for portable devices. USB drives Discuss cloud computing and cloud storage.Cloud computing is where the computer acts like a “cloud” of servers that supply applications to clients as a service rather than a product. Cloud storage is what cloud computing provides; online storageDescribe mass storage devices including enterprise storages systems, file servers, network attached storage, RAID systems, organizational cloud storage, and storage area network systems.Mass storage devices are specialized high capacity secondary storage devices designed to meet organizational demands for data storage. Used by large organizations for maintenance and security of data. An enterprise storage system is used to promote efficient and safe use of data across the networks within their organizations. File servers are dedicated computers that have a large storage capacity. A network attached storage is simpler than a file server and less expensive; they are used for home and small businesses needs. A RAID system is used to enhance organizational security by making backup copies of files. An organizational cloud storage has a high speed Internet connection where facilities contain banks of file servers to offer huge amounts of storage. A storage area network system is an architecture to link remote computer storage devices. ................
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