Storing electronic resources

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Computer technology may conveniently be grouped into: processor technology, storage technology and

STORAGE DEVICES

been significant developments n memory technology affecting three areas of performance spectrum;

Computers systems include two types of digital information storage: internal storage, within the CPU

can be treated as a structured file system.

the high speed, high performance the midrange and the low speed bulk memory systems.

In storage technology considering advances in devices for digital information storage it may be stated

of information storage and retrieval systems. It may be stated that all these innovations in storage

dimension to the information storage technology Video disks could be used to store large volumes of

FLASH COMPACT DIC AND OTHER STORAGE DEVICES 

memory retaining most recently referenced information and in a readily available place. In some cases,

The development of charge coupled devices (CCDs) and bubble memories have filled the gap which

Memory management, dynamic memory allocation, and virtue memory schemes, generally found n

that they contain no mechanical parts and could be used to store significant amount of information and

STORAGE DEVICES

cache memory may be at the top of a hierarchy of memories having a wide variety of characteristics.

microfloppies provide a convenient medal to store data. The development of video disk has added a new

software aspects.

It is now possible that even a small computer system might 


have cache memory, a small associative

slower than other semiconductor memories. These memories have advantage over magnetic disk n

that most of the primary storage n computers is now supplied by seem-conductor circuits. There have

There has been continuous improvement in recording densities of magnetic media Floppy disk and

technology provide us a variety of alternatives depending on the requirements of speed of operation.

information in digital form. These kinds of mass storage are believed to be very useful in the development

5.TYPES OF COMPUTER STORAGE

previously existed in the continuum of memory devices such as Fixed-head magnetic disk and these are

huge computer systems, are now appearing on computers which are small and less costly.

and the Backing (Bake up) storage on external devices such as disks or tapes. Different types of storage

media differ according to a number of criteria such as speed of operation, capacity cost, reliabilities the

invariably used for internal storage; these are categories as either RAM (random access memory) or

ROMs are used for data which is never altered for example, a computer’s operating system instructions,

surface, coated with a varnish containing an oxide which can be magnetized in one or two directions;

The various types of storage devices are available in computer market like Network Storage, Backup

magnetic storage media, either tapes or disks. With both of these data is recorded onto a plastic

Internal Storage Devices  internal storage is also known as main, primary or (for historical reasons) core

generally slow. Small cassette tapes, of relatively low capacity are used with microcomputers.

comparison with other computer operations and disk access times are one of the main limiting factors

Small electromagnets, close to the surface.

necessary; especially for archival data backup etc. Tapes are cheap means of storing data but access is

degree to which information is immediately accessible etc.

different.

n the speed of operation of retrieve system with information stored on disk.

Magnetic Tapes are very commonly used for storing large quantum of data for which rapid access is not

rapidly for example, data for running program. In the type of disk drive n large computer system, data is

ROM (read only memory) chips

which is one thousand mega bytes. Smaller computer systems use Winchester disks, with a single

program is running, which must be available instantaneously. Scion semiconductor chips are now

while RAM is used for data which is liable to change often, and instructions used in the execution of a

are read into internal storage when required. The most common form now, as for the last thirty years, is

program

each magnetization representing one bit of data. Data is written or read with the help of read/write heads.

hard disk in a sealed unit, floppy disks, which are compact, cheap and convenient for transfer of programs

a hard disk in day to day use. Floppy disks are available in two sizes, 1.44 MB and 1.2 MB but nowadays

and data. They are limited n storage capacity, with relatively slow access times, and less movement than

storage, or memory. It is used to hold those instructions and data required at any moment while a

Storage, Internal Storage and PC Storage Products but we think the manufacture wise classification are

Backup storage : Backup storage, also termed externa storage, is used to hold programs ad data which

Magnetic Disks are most widely used form of baking storage suitable for holding information required

for each disk Access times typically 001 second although much faster than tape, are rather slow by

recorded on the fat surfaces of circular disks reviving on a common spindle, with one read/write head

Disk capacities have increased greatly, from original values of about 10 MB to present units with 1 GB

1.2 MB floppy are not used.

Mobile Collections 

 E-books, Journal Databases, 

Other Databases

Mobile OPAC (MOPAC) 

 

Floppy disk and microfloppies provide a convenient media to store data. The development of video disk has added a new dimension to the information storage technology. Video disks could be used to store large volumes of information in digital form.