All computers include a kind of secondary storage to supplement the storage located within the CPU with reference to sequential storage and direct access storage.
Consecutive storage, is an organization or arrangement of data in a storage device consisting of one record following one other record in a particular order .. some computer storage media can only process consecutively arranged data. An example is a magnetic tape.
Direct access storage. Is a way of organizing data that allows records to be written and read without searching in sequence. DASD (direct access strorage device), a hardware unit that allows direct access storage, the tool has a direct read and write mechanism that can be redirected to any location in storage medium, magnetic disk, floppy disk, hard disk and compact disk.
DASD is a good medium master file. The master file is a conceptual representation of either a company resource or an environmental element as an example is a master file of inventory, accounts receivable, customer etc.
The use of other DASD is as a temporary storage medium for storing semi-processed data. The magnetic disk has proven invincible as DASD. The new DASD technology is the Compact Disk, Laser Disk or Optical Disk, describing the data with a combination of fine scratches on the surface of the disc created by the laser beam. These scratches are trenches that are burned or printed on the surface of the disc. The low intensity laser beam is used to read the scratches.
SECONDARY STORAGE RELATIONSHIP WITH PROCESSING
There are two ways to process data. Batch processing and on-line processing. Batch processing involves collecting all transactions and processing all at once, in batches. On-line processing involves the processing of transactions one by one, sometimes at the time of the transaction other transactions occur.
Therefore, transaction-oriented is often called transaction processing. Batch processing can be implemented using sequential storage media or direct access. The downside of this system is the fact that new files become good after a daily cycle. This means that management does not always have the most informative information that describes the physical system.
On-line processing requires direct access, developed to overcome outdated files. A technological breakthrough that allows on-line processing is the storage of magnetic disks.
A real-time system is a system that controls the physical system. This system requires the computer to respond quickly to the physical system state. The term realtime is used to describe the on-line system that reacts to the physical system's activities quickly enough to control the system. This system is a special form of on-line system that extends its capabilities by using conceptual resources to determine the operation of the physical system.
Consecutive storage, is an organization or arrangement of data in a storage device consisting of one record following one other record in a particular order .. some computer storage media can only process consecutively arranged data. An example is a magnetic tape.
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Direct access storage. Is a way of organizing data that allows records to be written and read without searching in sequence. DASD (direct access strorage device), a hardware unit that allows direct access storage, the tool has a direct read and write mechanism that can be redirected to any location in storage medium, magnetic disk, floppy disk, hard disk and compact disk.
DASD is a good medium master file. The master file is a conceptual representation of either a company resource or an environmental element as an example is a master file of inventory, accounts receivable, customer etc.
The use of other DASD is as a temporary storage medium for storing semi-processed data. The magnetic disk has proven invincible as DASD. The new DASD technology is the Compact Disk, Laser Disk or Optical Disk, describing the data with a combination of fine scratches on the surface of the disc created by the laser beam. These scratches are trenches that are burned or printed on the surface of the disc. The low intensity laser beam is used to read the scratches.
SECONDARY STORAGE RELATIONSHIP WITH PROCESSING
There are two ways to process data. Batch processing and on-line processing. Batch processing involves collecting all transactions and processing all at once, in batches. On-line processing involves the processing of transactions one by one, sometimes at the time of the transaction other transactions occur.
Therefore, transaction-oriented is often called transaction processing. Batch processing can be implemented using sequential storage media or direct access. The downside of this system is the fact that new files become good after a daily cycle. This means that management does not always have the most informative information that describes the physical system.
On-line processing requires direct access, developed to overcome outdated files. A technological breakthrough that allows on-line processing is the storage of magnetic disks.
A real-time system is a system that controls the physical system. This system requires the computer to respond quickly to the physical system state. The term realtime is used to describe the on-line system that reacts to the physical system's activities quickly enough to control the system. This system is a special form of on-line system that extends its capabilities by using conceptual resources to determine the operation of the physical system.
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