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Q. Why do we store our importantQ. Why do we store our importantdocuments?documents?Answer:Answer: We store our importantW...
Q. Where do you think a computer storesQ. Where do you think a computer storesdocuments / data?documents / data?Answer:Ans...
Q. What are two types of store?Q. What are two types of store?Answer:Answer: Two types of store are MainTwo types of store...
Q. Which type is used to store currentQ. Which type is used to store currentdata temporarily?data temporarily?Answer:Answe...
Q. Which type is used to store dataQ. Which type is used to store datapermanently?permanently?Answer:Answer: Backing store...
Dear students, today we shallDear students, today we shallstudy about the storage devicesstudy about the storage devices
Answer:Answer: These are hardware thatThese are hardware thatrecord and retrieves items torecord and retrieves items toand...
Answer: Some common storage devicesAnswer: Some common storage devicesare Magnetic tape, Hard Disk,are Magnetic tape, Hard...
STORAGE DEVICESSTORAGE DEVICESQ. What are the properties of storageQ. What are the properties of storagedevices?devices?An...
STORAGE DEVICESSTORAGE DEVICESNow we shall study these storage devicesNow we shall study these storage devicesone by oneon...
Magnetic TapeMagnetic TapeStores data magnetically likeStores data magnetically likeaudio cassetteaudio cassettePossesses ...
Magnetic DiskMagnetic DiskThe disk inside is round in shapeThe disk inside is round in shapeIt uses random access method t...
Floppy DiskFloppy DiskIt is small flexible disk kept inIt is small flexible disk kept inplastic coverplastic coverIt has l...
Q. Before the introduction of USB, what device isQ. Before the introduction of USB, what device isused to transfer a file ...
Hard DiskHard DiskMade up of a Metal diskMade up of a Metal diskinside sealed containerinside sealed containerLarge capaci...
Compact DiskCompact DiskThin metal disk in hard plasticThin metal disk in hard plasticcoatingcoatingLarger capacity than f...
Activity 1Activity 1Q. Arrange these storage devices inQ. Arrange these storage devices inorder from smallest to largest o...
Activity 1Activity 1Q. Put these storage devices in orderQ. Put these storage devices in orderfrom smallest to largest on ...
Activity 1Activity 1Q. Put these storage devices in orderQ. Put these storage devices in orderfrom smallest to largest on ...
Activity 2Activity 2Q. Which device is suitable to store the programsQ. Which device is suitable to store the programsand ...
Activity 2Activity 2Q. Which device is suitable to store a file of 800Q. Which device is suitable to store a file of 800ki...
HOME WORKHOME WORKTasks 1,2 and 3Tasks 1,2 and 3 on page 34 of your book.on page 34 of your book.Submission date:Submissio...
CONCLUSIONCONCLUSIONToday we have learned how computer storeToday we have learned how computer storedata, in next lesson w...
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STORAGE DEVICES

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STORAGE DEVICES

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STORAGE DEVICES

  1. 1. Q. Why do we store our importantQ. Why do we store our importantdocuments?documents?Answer:Answer: We store our importantWe store our importantdocument to have access to thesedocument to have access to thesedocuments in future.documents in future.
  2. 2. Q. Where do you think a computer storesQ. Where do you think a computer storesdocuments / data?documents / data?Answer:Answer: Computer store data in HardComputer store data in HardDisc, Floppy Disc and USB etc.Disc, Floppy Disc and USB etc.
  3. 3. Q. What are two types of store?Q. What are two types of store?Answer:Answer: Two types of store are MainTwo types of store are Mainstore & Backing Store.store & Backing Store.
  4. 4. Q. Which type is used to store currentQ. Which type is used to store currentdata temporarily?data temporarily?Answer:Answer: Main store is used to store dataMain store is used to store datatemporarily, e.g. RAM.temporarily, e.g. RAM.
  5. 5. Q. Which type is used to store dataQ. Which type is used to store datapermanently?permanently?Answer:Answer: Backing store is used to storeBacking store is used to storedata permanently, e.g. Harddata permanently, e.g. HardDisk.Disk.
  6. 6. Dear students, today we shallDear students, today we shallstudy about the storage devicesstudy about the storage devices
  7. 7. Answer:Answer: These are hardware thatThese are hardware thatrecord and retrieves items torecord and retrieves items toand from a storage medium.and from a storage medium.Q. Define storage device:Q. Define storage device:STORAGE DEVICESSTORAGE DEVICES
  8. 8. Answer: Some common storage devicesAnswer: Some common storage devicesare Magnetic tape, Hard Disk,are Magnetic tape, Hard Disk,Floppy Disk, Compact Disk etc.Floppy Disk, Compact Disk etc.Q. Can you name some storageQ. Can you name some storagedevice?device?STORAGE DEVICESSTORAGE DEVICES
  9. 9. STORAGE DEVICESSTORAGE DEVICESQ. What are the properties of storageQ. What are the properties of storagedevices?devices?Answer:Answer: Storage devices are permanent storageStorage devices are permanent storage They are less expensive than main memoryThey are less expensive than main memory(RAM)(RAM) They are slower than main memory (RAM)They are slower than main memory (RAM)
  10. 10. STORAGE DEVICESSTORAGE DEVICESNow we shall study these storage devicesNow we shall study these storage devicesone by oneone by one
  11. 11. Magnetic TapeMagnetic TapeStores data magnetically likeStores data magnetically likeaudio cassetteaudio cassettePossesses Large capacityPossesses Large capacityCheap storage deviceCheap storage deviceIt uses serial access methodIt uses serial access methodto store data.to store data.Runs at slow speedRuns at slow speedUsed as a backup deviceUsed as a backup device
  12. 12. Magnetic DiskMagnetic DiskThe disk inside is round in shapeThe disk inside is round in shapeIt uses random access method toIt uses random access method toread or write data.read or write data.Faster than magnetic tapeFaster than magnetic tapeTypesTypesFloppy DiskFloppy DiskHard DiskHard Disk
  13. 13. Floppy DiskFloppy DiskIt is small flexible disk kept inIt is small flexible disk kept inplastic coverplastic coverIt has low capacityIt has low capacityIt is faster speed than tapesIt is faster speed than tapesIt is portableIt is portableIt is cheapIt is cheapUsed to transfer a small filesUsed to transfer a small filesfrom one computer to anotherfrom one computer to another
  14. 14. Q. Before the introduction of USB, what device isQ. Before the introduction of USB, what device isused to transfer a file from one computer toused to transfer a file from one computer toanother?another?Answer:Answer: Before the introduction of USB Floppy Disk isBefore the introduction of USB Floppy Disk isused to transfer files from one computer toused to transfer files from one computer toanother.another.Q. Why it is called “floppy” disk?Q. Why it is called “floppy” disk?Answer:Answer: It is flexible so it is called floppy disk.It is flexible so it is called floppy disk.
  15. 15. Hard DiskHard DiskMade up of a Metal diskMade up of a Metal diskinside sealed containerinside sealed containerLarge capacityLarge capacityFastest speedFastest speedFixed inside computerFixed inside computerUsed to store large amountUsed to store large amountof data and softwareof data and softwareAlso called Winchester DiskAlso called Winchester Disk
  16. 16. Compact DiskCompact DiskThin metal disk in hard plasticThin metal disk in hard plasticcoatingcoatingLarger capacity than floppyLarger capacity than floppydiskdiskFaster speed than floppy diskFaster speed than floppy diskUsed for software distributionUsed for software distributionis called “compact” diskis called “compact” diskbecause it is very thinbecause it is very thin
  17. 17. Activity 1Activity 1Q. Arrange these storage devices inQ. Arrange these storage devices inorder from smallest to largest onorder from smallest to largest onthe bases of Storage capacity/size.the bases of Storage capacity/size.Answer:Answer:1.1.Floppy diskFloppy disk2.2.Compact diskCompact disk3.3.Magnetic tapeMagnetic tape4.4.Hard diskHard disk
  18. 18. Activity 1Activity 1Q. Put these storage devices in orderQ. Put these storage devices in orderfrom smallest to largest on thefrom smallest to largest on thebases of Access speedbases of Access speedAnswer:Answer:1.1.Magnetic tapeMagnetic tape2.2.Floppy diskFloppy disk3.3.Compact diskCompact disk4.4.Hard diskHard disk
  19. 19. Activity 1Activity 1Q. Put these storage devices in orderQ. Put these storage devices in orderfrom smallest to largest on thefrom smallest to largest on thebases of Cost per gigabytebases of Cost per gigabyteAnswer:Answer:1.1. Magnetic tapeMagnetic tape2.2. Hard diskHard disk3.3. Compact diskCompact disk4.4. Floppy DiskFloppy Disk
  20. 20. Activity 2Activity 2Q. Which device is suitable to store the programsQ. Which device is suitable to store the programsand applications which run on computer?and applications which run on computer?Answer:Answer: Hard disk is suitable to store theHard disk is suitable to store theprograms and applications which run onprograms and applications which run oncomputer.computer.Q. Which device is suitable to store MS OfficeQ. Which device is suitable to store MS Officesoftware setup?software setup?Answer:Answer: Compact disk is suitable to store theCompact disk is suitable to store theprograms and applications which run onprograms and applications which run oncomputer.computer.
  21. 21. Activity 2Activity 2Q. Which device is suitable to store a file of 800Q. Which device is suitable to store a file of 800kilobytes?kilobytes?Answer:Answer: Floppy disk is suitable to store theFloppy disk is suitable to store theprograms and applications which run onprograms and applications which run oncomputer.computer.Q. Which device is suitable to store back up copy ofQ. Which device is suitable to store back up copy ofthe data of schoolthe data of school network?network?Answer:Answer: Magnetic tape is suitable to store theMagnetic tape is suitable to store theprograms and applications which run onprograms and applications which run oncomputer.computer.
  22. 22. HOME WORKHOME WORKTasks 1,2 and 3Tasks 1,2 and 3 on page 34 of your book.on page 34 of your book.Submission date:Submission date: 1212ththFebruary, 2011February, 2011
  23. 23. CONCLUSIONCONCLUSIONToday we have learned how computer storeToday we have learned how computer storedata, in next lesson we will learn some moredata, in next lesson we will learn some morecapabilities of computer and compare in withcapabilities of computer and compare in withmanual systems.manual systems.

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