Page history last edited by Kate M. Fisher 9 years, 11 months ago Overview of the Compact Disk As a medium for reproducing music, the compact disc, or C. In order to play and listen to just one hundred and twelve titles, people had to purchase a CDP, or simply, a C. Just like other great technologies that came before this time, the compact disc was in high demand.
Several types of data storage exist in most computer systems. They vary in speed of access, cost per unit of data, and reliability. Usually very small, and managed by the operating system. General-purpose machine instructions operate on main memory. Usually too small even with megabytes and too expensive to store the entire database.
Data in flash memory survive from power failure. Reading data from flash memory takes about 10 nano-secs roughly as fast as from main memoryand writing data into flash memory is more complicated: To overwrite what has been written, one has to first erase the entire bank of the memory.
It may support only a limited number of erase cycles to.
It has found its popularity as a replacement for disks for storing small volumes of data megabytes. Typically the entire database is stored on disk.
Data must be moved from disk to main memory in order for the data to be operated on. After operations are performed, data must be copied back to disk if any changes were made.
Disk storage is called direct access storage as it is possible to read data on the disk in any order unlike sequential access. Disk storage usually survives power failures and system crashes.
CD-ROM compact-disk read-only memoryWORM write-once read-many disk for archival storage of dataand Juke box containing a few drives and numerous disks loaded on demand.
Cheaper, but much slower access, since tape must be read sequentially from the beginning. Used as protection from disk failures! Primary, secondary, and tertiary storage. Secondary or on-line storage: Tertiary or off-line storage: Volatile storage loses its contents when the power is removed.
Without power backup, data in the volatile storage the part of the hierarchy from main memory up must be written to nonvolatile storage for safekeeping.CD:ROM drives are the thing of the future.
CD:ROMs are used in almost every computer around the world. CD:ROM stands for COMPACT DISK READ ONLY MEMORY. That means that you can only read information off the disk.
Three and a half disks are disks that you can read and wriye infromation from. Another form of largely read-only memory is the optical compact disc, developed from videodisc technology during the early s.
Data are recorded as tiny pits in a single spiral track on plastic discs that range from 3 to 12 inches ( to 30 cm) in diameter, though a .
information regarding computer forensics, disk imaging, and RAID technology is provided. The experimental process is explained in the body of the article, with details regarding.
While an overview of how compact disc technology developed and became so popular is presented, it fails to explain how the technology works. There are, however, relatively simple processes accounting for how a compact disc is read and how the CD-ROM drive .
Chapter-1 OVERVIEW OF COMPUTER Definition: This can be taken as the first “Read only Memory” device. Chapter 1-Overview of Computers MDRPUC, Hassan 7 | P a g e Depending on the development of the technology the generation of computer is classified into five generations. Flash memory is an electronic (solid-state) non-volatile computer storage medium that can be electrically erased and reprogrammed..
Toshiba developed flash memory from EEPROM (electrically erasable programmable read-only memory) in the early s and introduced it to the market in  The two main types of flash memory .