Consequently, a hard drive or an additional, slower ssd may used as secondary storage to a primary, faster, pcie ssd. Cbse central board of secondary education chairman chandigarh chirag jain computer networks education educational loans iit india information information technology internet it it industry jallandhar jobs kapil sibal network networking pcte power point presentation power point presentations powerpoint. Mass storage machines can store up to several trillion bytes of data and hence are used to store or save large databases, such as the information of customers of a big retail chain and library transactions of students in a college. They also allow smartphone users to download films and shows on mobile phones for offline watching. Other factors such as speed of data access, cost and portability will also determine which storage device.
Marathi computer training without a teacher teach computer learn computer using software self study. Colette lemard flash memory you may recall that eeprom can be erased by using high voltages. Secondary storage devices ppt video online download. It can be any storage device beyond the primary storage that enables permanent data storage. Secondary storage or auxiliary storage is any storage device designed to retain data and instructions in a more permanent form. The storage devices became a necessity,as the world started computerizing everything so came the need for storing information, because papers took a large space and are not permanent as they are physical the evolution started with the introduction of magnetic storage devices the surge came when tape recorder was invented in 1928 by fritz pfleumer the tape recorder casette had a magnetic. Categorizing storage devices magnetic storage devices optical storage devices powerpoint presentation. Secondary storage is about two orders of magnitude cheaper than primary storage. Presentation on different types of storage devices solid. All programs, pictures, songs, etc are converted into files made up of millions of zeros and ones. Contents of secondary memories are first transferred to main memory, and then cpu can access it. Types of storage devices physical components or materials on which data is stored are called storage media. If so, share your ppt presentation slides online with. Secondary storage technology refers to storage devices and storage media that are not always directly accessible by a computer.
Explain the function and interaction of the primary ram, rom and secondary storage devices magnetic and optical. Chapter 12, exploring the digital domain in this chapter. Storage media in early computers earliest computers used paper for. Meanwhile, nonvolatile storage devices have been referred to as secondary storage, external memory or. Ppt secondary storage devices powerpoint presentation free to download id. Theyll give your presentations a professional, memorable appearance the kind of sophisticated look that todays audiences expect. In general, only the file system knows on which device a file resides. Primary storage device can store and retrieve data, as they are feed into it. Primary storage device or random access memory ram the term random access means that any word in the memory may be accessed, without having to go through all the other words to get to it. Types of secondary storage devices in computers jotuts. Computer data storage is a technology consisting of computer components and recording media that are used to retain digital data. However, the operating speed is slower than that of the primary storage. Use your mouse to click on each slide as you advance through the presentation.
Magnetic sequential access memory is typically used for secondary storage in generalpurpose computers due to their higher density at lower cost compared to ram, as well as resistance to wear and nonvolatility. In this chapter, you will learn about the many types of secondary storage devices including their. Secondary storage devices are essential as the size of p rimary storage or main memory in every computer is limited. Secondary storage devices ahijah lane secondary storage devises. There are two types of storage devices used in computers. One task requires that they label the different components of a hard drive. Ppt data storage devices powerpoint presentation free. Ppt secondary storage devices powerpoint presentation free to. Depending on whether secondary memory device is part of cpu or not, there are two types of secondary memory fixed and removable. This replication or data backup process, ensures there is a second copy of the data. The capacity amount of data that a storage device can hold varies significantly between different devices.
Two main categories of storage technology used today are magnetic storage and optical storage. Secondary memory secondary memory is the slowest and cheapest form of memory. This article throws light upon the two types of storage devices used in a computer. The first generation of operating systems, for instance didnt have very large storage capabilities and so they tended to offload storage onto some secondary medium between runs. Types of storage devices lesson 9 powerpoint presentation. Secondary storage is nonvolatile, meaning that the data and instructions remain intact when the computer is turned off. A newer storage device is a usb flash drive which is about the size of your car key. The size of a file is measured in units called bytes. A secondary storage device has a larger storage capacity and can store data permanently.
It plugs into almost any usb port in your computer and the data is erasable. So that data which is stored into the nonvolatile storage devices will never be loosed when the power switched off. This memory is external to the cpu the computer usually uses its inputoutput channels to access secondary storage and transfers the desired data. Presentation on different types of storage devices free download as powerpoint presentation. Enough content for 2 lessons in teacher ppt covers.
A secondary storage device refers to any volatile storage device that is internal or external to the computer. Presentation on storage device linkedin slideshare. To carry out big jobs like commercial data processing, it becomes essential that data be held in some expansive form of storage. These devices may cover a wide range of speeds and capacities. They are asked a series of questions that focus on optical, magnetic, and solid state storage devices. Magnetic disks is the property of its rightful owner. It is the future of computer memory storage devices. Any storage unit of a computer system is characterized and evaluated based on following properties storage capacity, access time, cost per bit of storage, volatile and random access. The earliest form of secondary storage was punch cards. It is a device that hold information until it is deleted of overwritten. Data storage has expanded from text and numeric files to include digital music files, photographic files, video files, and much more. There are many different types of secondary storage available on the markets today. Alternatively referred to as external memory, secondary memory, and auxiliary storage, a secondary storage device is a nonvolatile device that holds data until it is deleted or overwritten.
The storage capacity ranges from 128 mb to 16gb and rising. The storage capacity of usb drive can be up to 256 gb or more. Huge volume of data are stored here on permanent basis and transferred to the primary storage as and when required. Secondary storage devices this section of the memory is also referred to as backup storage. Computer data storage is a technology consisting of computer components and recording.
Secondary storage devices ppt video online download slideplayer. Secondary memory devices include magnetic disks like hard drives and floppy disks. Secondary storage devices revision worksheet teaching. However, it is important to bear in mind that one of our most important secondary storage media is the hard disk which is not external. Memory cards a memory card is a removable flash memory to store data.
Primary and secondary storage devices linkedin slideshare. Learn vocabulary, terms, and more with flashcards, games, and other study tools. In this type of memory the cost per bit of storage is low. The storage capacity of primary storage is not sufficient to store the large volume so secondary storage. The device can be both external and internal to a computer and includes.
Storage devices are also known as storage medias or storage medium. Let us look at some of the secondary memory devices available. Secondary storage also know as external memory or auxiliary storage not directly accessible by the cpu. Download computer memory ppt pdf presentation study mafia.
The storage capacity of primary storage is not sufficient to store the large volume so. Worlds best powerpoint templates crystalgraphics offers more powerpoint templates than anyone else in the world, with over 4 million to choose from. The memory of a computer is the most important component of cpu. The key difference between primary and secondary memory is speed of access. The capacity of these devices is very high means we can store the huge amount of data into the secondary storage devices. Most of these cards are very small and can retain data without power. In an enterprise environment, the storage of secondary data can be in the form of a networkattached storage nas box, storagearea network san, or tape. Secondary storage also known as external memory or auxiliary storagenot directly accessible by the cpu. A memory card can b inserted in to a slot on computer or mobile device.
Larger capacity but whose access time is slower than that of the main memory. The three primary categories for storage devices are magnetic storage, optical storage and solid. Even the hard drive in your computer is secondary storage, as programs such as word or powerpoint, are stored there when not in use as well as all of your files. Basics of computers secondary memory tutorialspoint. Secondary storage devices california state university. We can store data into the secondary storage devices in the form of giga bytes and tera bytes. Secondary storage is actually any storage not currently in use. Categorizing storage devices storage devices hold data, even when the computer is turned off. Other storage devices include external hard drives.
In the picture to the right, is an example of a drobo external secondary storage devise purpose of storage. As compared to secondary storage units, primary storage units have less storage capacity. These files can be moved from one source to another. A storage medium that holds information until it is deleted or overwritten. The file system is designed to accommodate any configuration of secondary storage devices. Secondary storage devices powerpoint ppt presentation. Secondary storage typically backs up primary storage through data replication or other data backup methods. Ccoommppuutter er ffununddaammenenttaallss pprradadeeeepp kk. Chapter 8 secondary storage 8introduction data storage has expanded from text and numeric files to include digital music files, photographic files, video files, and much more. In practice, almost all computers use a storage hierarchy. Describe common storage technologies such as optical, magnetic and solid state explain the need for secondary storage select suitable storage devices and storage media for a given application and justify their choice using characteristics such as capacity, speed, portability, durability and reliability originally designed for ocr. Units such as bytes, kilobytes and megabytes are used to describe a storage device s capacity. Winner of the standing ovation award for best powerpoint templates from presentations magazine.
This contains explanations on different kind of storage medium including magnetic storage device, flash storage device etc. The final two sections focus on recent system technologies such as storage networking and cloudbased storage. These new types of files require secondary storage devices with much greater capacity than floppy disks. A storage device is a hardware device capable of storing information. This differs from primary storage technology, such as an internal hard drive, which is constantly available. Computers have two different types of storage primary temporary storage and secondary permanent storage. A secondary storage device is also known as an auxiliary storage device or external storage. Advantages and disadvantages of secondary storage advantages possesses the capacity to store enormous amounts of information safe reliable permanent disadvantages the information on the secondary device has to be first located, then move to the primary memory or.
Mass storage devices refer to the saving of huge data in a persistent manner. Learning objectives 1 to understand the purpose of secondary storage and to be able to identify examples of such devices. It is a core function and fundamental component of computers 1516 the central processing unit cpu of a computer is what manipulates data by performing computations. Ppt secondary storage devices powerpoint presentation. Secondary storage devices provide a way for the computer to store information on a permanent basis. Secondary storage devices slide 298 in this chapter you will learn about. Presentation on storage devices linkedin slideshare. The primary storage device for a personal computer is a hard drive, also known as a type of magnetic media.
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