knowledge of computer storage devices

Knowledge of computer storage devices

Computerized storage has come a long way since the introduction of computers in to daily life. Although different forms of storage media have come and gone, several clear winners have emerged from the media wars. These classes of storage devices are used in computers, video players and cell phones the world over. Storage capacity has increased at an exponential rate since the 1980s and is likely to keep climbing.

Storage devices are one of the core components of any computing device. They store virtually all of the data and applications on a computer, except for hardware firmware which is generally managed through separate read only memory or rom (computerhope, n.d.)

Usage of comuter devices:it helps in elimaniting the limitations of human interference and provides beeter efficiency it also provides many other uses and advantages to the users.there are many reasons anduses of storage.it provides many uses to the users as it provides great flexibility to the users and helps in keeping all the important rcords at a synchoronized place with loads of data security.ir helps in keeping s check.it helps in keeping a check on all the records and also helps in maintaining a check on the number of users who have access to the data.it also helps in providing security to thr confidential data that is very important for the user.with the use of dsts storsge and other storage,ir easily.data conversion and security becomes aesy with use of storage.it also helps inshifting the focus to more important activities as the data can be stored ver easily and with loads of data security. (educba, n.d.)

Primary storage; Essential stockpiling gadgets are inward to the frame work and are the quickest of the memory? Stockpiling gadget classreguraly, essential stockpiling gadgets have an occurrence of the relative multitude of information and application as of now being used or being prepared. The pc brings and keeps the until the interaction is finished or information is at this point not needed. Random access memory (RAM), graphic card memory and cache memory are common examples of primary storage devices.

RAM; it is called random access memory because any of the data in RAM can be accessed just as fast as any of the other data. There are two types of RAM.1 DRAM, 2 SRAM

(techopedia, n.d.)

Secondary storage; devices primarily refer to storage devices that swerve as an addition to the computer’s RAM and cache memory. Since they always consist of non-volatile memory, the allow the user to permanently store data on them. Typically, secondary storage allows for the storage of ranging from a few megabytes to petabytes. These devices store virtually programs and applications stored on a computer, including the operating system, device drivers, applications and general use data.

Tertiary storage or tertiary memory is a level below secondary storage. Typically, it involves a robotic mechanism which will mount and dismount removable mass storage media in to a storage device according to the system’s demands: such data are often copied to secondary storage before use it is mainly used for archiving information that is rarely accessed because it is much slower than secondary storage. This is particularly useful with exceptionally large data stores that can be accessed without human operators. Typical examples are tape libraries and optical jukeboxes. (wikipedia, n.d.)

Offline storage: is the storage of computer data on a medium or device that is not under the control of a processing unit. The media is stored, usually in a secondary or tertiary storage device, and then physically removed or disconnected, it must be placed or plugged in unlike tertiary storage, it cannot be accessed without human interaction, offline storage is used to transfer information as loose media can be easily transported physically, in addition, I it’s useful in disaster situations, where for example, a fire destroy the original data, remote medium is not affected, allowing disaster recovery. Offline storage increases overall information security because it is physically inaccessible from a computer and the confidentiality or integrity of the data cannot be compromised by attack techniques in addition if information stored for archival purposes in rarely used offline storage is cheaper than tertiary storage. Ex; portable hard discs, CDs .DVDs, USB flash drives and SD cards. (techopedia, n.d.)

Magnetic storage: computer systems need to store SATA in digital format.one of the most widely used types of digital data storage is magnetic storage. This refers to any type of data storage using a, magnetized medium. Digital data consists of binary information, which is data in the forma zero and ones. There are many magnetic tape EX floppy disks, magnetic tape, and magnetic stripes on credit cards

magnetic tape: a magnetically coated strip of plastic on which data can be encoded, tape for computers are similar to tapes used to store music and tape is much less expensive than other storage mediums but commonly a much slower solution that is commonly used for backup.

floppy disc: a soft magnetic disk and floppy disk are portable also floppy disks are slower to access than hard disks and have less storage capacity, buy they are much less storage capacity, but they are much less expensive.it can store data up to 1.44mb and two common sizes. (techopedia, n.d.)

Optical storage devices: optical storage is also known as optical media or optical memory or optical medium, and it allows all read and write activities which are performed by laser beam. Optical disc is any storage media that holds content in digital format and read using a laser assembly is cinsidered optical media.the most common types of optical media are

Blu-ray disc(BD)

Compact disc (CD)

Digital versatile disc(DVD)

(wikipedia, n.d.)

CD-ROM: CD ROM stands for compact disc read read only memorymand CD-ROM comes in the “random access”categorys devices.these types pf disc can capable to store almost 800MB of digital data.these data.these data can’t discard.

DVD- ROM: DVD ROM stands for digital versalite disc-read only memory and it also comes in the random accesss category devices.dvd-rom discs can stolre data up to 4.7 gb but dual layer dvd devices storage capacity is double.these types of discs are used to store ultra quality vedio

BLUE RAY: blue ray discs are totally replaced by DVDS ,bbecause these discs are capable to hold data up to 20–50 gb as well as double layer blue rats discs can store double data.due to high storage capacity,blueb ray discs are used to store HD videos. (techopedia, n.d.)

flash memory devices: flash memory is a non — volatile memory chip used for storage and for transferring data between a personal computer and digital devices.it has the ability to electronically d reprogramed erased.it is often found in USB flash drives, mp3 players, digital cameras and solid-state drives.EX USB, memory card.

USB: a small, portable flash memory card that plays in to a computers USB port and function as a portable hard drive flash drives are available in sizes such as 2GB, 4GB and up to 256GB and are an easy way to transfer and store in information. (wikipedia, n.d.)

MEMORY CARD: an electronic flash memory storage disk commonly use3d in consumer electronic devices such as digital cameras, mp3 players, mobile phones, and other small portable devices.

online cloud storage: cloud storage is way of storing data online instead of your local computer.it requires an internet connection in order to upload, modify, and share documents, presentations, spreadsheets, images audio video, etc., with others. Online storage service provides don’t store any data on the hard disk of your pc. Cloud storage tools help to access your data from device .EX GOOGLE DRIVE, DROPBOX (guru99, n.d.)

Most used storage devices: Optical discs and flash memory devices are most popular and to much lesser extent removable hard disk drives.in enterprise uses, magnetic tape is predominant. The most widely used offline storage today. Also known as disconnected storage and is a computer data storage on a medium or advice that is not under the control of processing unit5.it must be inserted or connected by human operator before a computer can access it again. Also known as disconnected or removable storage and is a computer data storage on a medium or a device that is not under the control of a processing unit.it must be inserted or connected by a human operator before a computer can access it again. Example floppy disk, zip diskette, USB flash drive, memory card

Characteristics of computer storage devices: Once we are aware that there are different types of storage device, we also need to be aware of the different characteristics of storage types to allow us to identify the most appropriate storage for a given scenario there are six main characteristics that we can consider when looking at different types of data.

CAPACITY: capacity relates to volume of data that can be stored on device.in some circumstances, it is important to have a large capacity.

SPEED: when we discus speed of a storage device, we are referring to how quickly the computer can read and write data to and from device. This is often dependent on whether the device contains moving parts.

PORTABILITY: portability is often an important factor for storage devices as we use more devices that move around with us characteristics of a portable device are being lightweight and small- imagine a smartphone with a full sized hard drive.

DURABILITY: if something is durable. That means that it can with stand physical movement or even being dropped.

RELIABILITY: it’s easy to confuse durability and reliability, but reliability refers to whether a device can be relied upon to work time and time again

COST: the cost of storage can be looked in several ways. We can measure cost per MB, or the cost of the device as a whole. Sometimes, although the cost per MB many be higher, the capacity needs are smaller making the cost per device more important. (teachallabout, n.d.)

Written by

Chanuka prabhath

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