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January 08, 2015

Data Storage Devices of Computer

160 comments

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Friends, in our previous post, we have discussed "How the Computer keeps data in various types of Memory". Today we shall learn about some important Data Storing devices of Computer. As you know, the computer takes data inside and shows the output whenever we need it. The storing devices in the computer are called Disk Devices. They are mainly of five types.

1. Hard Disk

A Hard Disk is used to store / retrieve the data or information. A hard disk is permanently kept in the computer at the time of purchase or installation. It can not normally be removed from the computer. Whatever information that we save in the computer is stored in this hard disk.

The storing capacity of hard disk is higher than any other storing disk devices. Now a days the storing capacity of hard disk is 80 to 160 GB and even more.


2. Floppy Disk 

A floppy disk is a device used to record and take the information from the computer to elsewhere. We can also see the information and programs taken from other computers into our computer with the help of floppy disk. If we do not need the information stored in floppy, we can delete the unwanted information and store some other information in its space.

If you are using a floppy in the computer, it can be termed as 'A' drive.

Previously we are having computers with two floppy drives. e.g., one fro floppy drive 'A' and another for 'B'. There after, computers will, have only one floppy drive called 'A' drive. The limitation of Floppy disk is that we can store only limited data (Hardly 8 image files for instance). The modern computers however do not contain any floppy drive.

3. Compact Disk 

Sometimes you may not have certain types of programs and packages in your computer. Suppose we want to install Java or Oracle program in our computer. In that case we will take these programmes and packages from outside source and feed into our computer. The instrument that is useful in this connection is called Compact Disk (CD). It can store the information from 400 to 750 MB.

Many latest programs are available only on these Compact Disks. We can directly operate some programs only from compact disk. As the storing capacity in compact disk is much more than a floppy disk, we can store big databases and multimedia applications in compact disk.

Let us see the difference between a compact disk and a floppy disk. A compact disk will store much more information than a floppy disk. The compact disk holds about 500 times of the storing capacity than that of a floppy disk which holds only 1.44 mb. Another difference is that in CD Rom, we can only read data but can not record it on compact disk if it was filled with data. In a floppy disk, we can read, delete and record the information. But now a days we can have a recordable compact disks available in the market on which we can read and record.

4. Digital Versatile Disk (DVD)

A DVD is just like a CD rom but it holds more information than a CD which can store only 500 to 700 MB of data. The DVD holds about 5 GB of data. The quality of DVD is also much more better than a CD.

5. PEN Drive

A recent addition of storage devices is Pen Drive. A Pen Drive (also known as Thumb Drive or Flash drive) is a small storage device which plugs right into a USB port on the computer. It can hold data upto 16 GB. It needs no software, no cables, no drivers and even no batteries.

Important Recent Updates :
  • Now a days External Hard disks are also available in market. These function similar to Pen Drives. Capacities of external HDDs generally range from 160 GB to 6 TB.
  • Blu-ray Disc (BD) is latest technology advancement than DVDs. This digital optical disc data storage format designed to supersede the DVD format, in that it is capable of storing high-definition video resolution (1080p). The storage capacity of Blue Ray Disks varies from 25 GB to 128 GB.
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160 comments:

  1. i have obc certificate dated 14/07/2014 is it enough for d interview????

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  2. Wht documents are required for interviw
    Pls tel me

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  3. Is there any rule like we have to study local language in 10th standard for IBPS clerk like the one in RRB???

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  4. All about Contactless Cards

    First in the country to launch Credit and Debit Cards using Near Field Communication technology

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  5. can any one plz create a group for selected candidates in facebook

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  6. All about Contactless Cards

    ICICI Bank launches country's first ‘contactless’ Credit and Debit Cards using Near Field Communication technology.

    These
    cards enables its customers to make electronic payments by just waving
    the cards near the merchant terminal in lieu of dipping or swiping them.

    The
    Bank's 'Coral Contactless Credit Card’ and ‘Expressions Wave Debit
    Card’ are powered by 'MasterCard contactless' and ‘Visa payWave'
    technologies, respectively.

    ReplyDelete
  7. All about Contactless Cards

    ICICI Bank launches country's first ‘contactless’ Credit and Debit Cards using Near Field Communication technology.

    These cards enables its customers to make electronic payments by just waving
    the cards near the merchant terminal in lieu of dipping or swiping them.

    The Bank's 'Coral Contactless Credit Card’ and ‘Expressions Wave Debit
    Card’ are powered by 'MasterCard contactless' and ‘Visa payWave'
    technologies, respectively...

    ReplyDelete
  8. can u ask kishan as he faced interview..

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  9. http://www.gr8ambitionz.com/2013/01/required-documents-you-should-carry-for.html

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  10. RAID(Redundant Array of Independent Disk)

    Level 0-Striiped disk array without fault tolerance
    Level 1-mirroring and duplexing
    Level 2-error correcting coding(Hamming Code)
    Level 3-Byte interleveled Parity-prallel transfer with parity
    Level 4-block dedicated parity drive- Independent data disk with shared parity disk
    Level 5-block interleveled distributed parity
    Level 6-Independent data disks with double(independent) parity

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  11. No, there is no such rule

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  12. Regulagedda SivakumarJanuary 8, 2015 at 1:13 PM

    do u know ur typing speed?

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  13. Regulagedda SivakumarJanuary 8, 2015 at 1:31 PM

    category? how u attempted typing test?

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  14. Umm. Ok dude.. congrtzz for u. .

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  15. Is there any chance of releasing second list.. friends??

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  16. what is ur native place??do u know on what basis they will give interview center??

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  17. back bencher studentJanuary 8, 2015 at 2:05 PM

    sir/mam
    Please upload some material for cooperative bank po exam.

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  18. Sbi clerk final results kabhi ayenga

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  19. venkatesh gunaparthiJanuary 8, 2015 at 2:47 PM

    Thankuu broo...

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  20. venkatesh gunaparthiJanuary 8, 2015 at 2:47 PM

    40wpm and 37forms I think....

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  21. Hi venkatesh garu congrts....n if u dnt mind can u sugest me how to score 70 marks abv in xam pa xam..plz

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  22. venkatesh gunaparthiJanuary 8, 2015 at 2:55 PM

    maybe undachu.... indhulo chalamandi drop aipotaru... banks ki ala vellipotaru. so inkoka list untundhii

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  23. venkatesh gunaparthiJanuary 8, 2015 at 2:57 PM

    main scoring reasoning and arithmetic.... avi easy ga untai n score vastadi. gk gurinchi naaku assalu telidhu. but adi prepare aite manaki plus point...

    ReplyDelete
  24. venkatesh gunaparthiJanuary 8, 2015 at 2:58 PM

    broo.... verification epudu untundii...? ante naku jan23 IBPS PO interview undhi... renduu clash aite chastanuu.... and verification ki velte mana original certificates vallaki icheyaali

    ReplyDelete
  25. venkatesh gunaparthiJanuary 8, 2015 at 2:59 PM

    Certificate verification epudu undachuu....?? I have IBPS PO interview on jan23rd. So if those two exams were on the same day..... then it will be damn....

    ReplyDelete
  26. Hai madam.my local languga is telugu.i am from ap.but because of my husband job we are living in banglore.i wrote ibps clerk exam in banglore..in interview will theyask kannada to me?or telugu language?plz send reply madam

    ReplyDelete
  27. Does anyone have idea about Magical book Quicker maths book by Tyra (BSC Academy),i want to know how is it as i am planning to buy,Please help me if someone has refer this book.

    ReplyDelete
  28. HI, i have po interview on 23 jan,iam an 2010 pass out, i didn't
    mentioned any experience in application, what should i say about this
    gap. . .please reply

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  29. mine 3rd jan 2014 this one valid r not.

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  30. I have OBC certificate dated 5/02/2014, is it enough for coming interview???

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  31. Thank you for this nice and detailed explanation. But I need MS Office in this patter. Plz provide as soon as possible. I have my exam in feb. Thank you in advance

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  32. No s for po it should be after 1/8/13it would b same for clerks too

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  33. please upload the material for preparing lic AO

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  34. No i lost my reg no in mail also it has been deleted wt to do ????????

    ReplyDelete
  35. please upload the material for NICL AO

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  36. Hi friends any one know tamilnadu highest score in rrb asst

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  37. no need of character cert it is only asked in sbi interviews not in ibps

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  38. no you should need to have obc after august of 2014 febuaray is not sufficent

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  39. they ask canada only mam

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  40. I have that book and that book has lot of shortcuts and you can acquaint yourself with lot of shortcuts witch will help you

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  41. Friends pls tell me abt SC certificate does it has any validity..pls let me know..

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  42. before 13th of this month

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  43. Official notice is given regarding postponement pf CGL Tier-2

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  44. But i lost reg no in email tooo wats the other process i hv online transistion details

    ReplyDelete
  45. Say u did buiss lub lub.. did some degree n corres

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  46. dont worry those who got less than 129 try next year bcoz last year my score 129 OC i didnt not get in any hindi speaking state lol

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  47. thanks aswini ..thanks for the reply ...good luck

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  48. yes....it's enough...

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  49. Check sms in ur mobile...they have sent the reg no and password..me too lost the email..took it from my sms

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  50. Frnd i dont hv any except online transistion details

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  51. in o s 1 u will surely get selected

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  52. but need hard and sharp practice in interview for it follow gr8ambition interview tips

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  53. Is there any chance for the people who got 150 in 2nd or 3rd phase?

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  54. I had rrb po interview... They checking confidence level... I had morning session but had at 4.00:(... They asked myself m some financial inclusion questions... All the best for u...

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  55. Is its clerk or po??

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  56. hi anija, me too from kollam did u clear ibps clerk?? any idea how much chances r there in kerala this time??

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  57. humm kollam exam centre vachittu avanmar thirunelveliyil poyi ezhuthan polum... ivane okke enthu cheyanam :/

    ReplyDelete
  58. Hi i applied for kollam and got some thirunelveli.. I a quite disgruntled...

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  59. is there any chances for 156 OA in up 4 general ? .....pls reply.....

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  60. Thanks a lot for your help and all the best for all your exams.

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  61. yes. In previous year people above 130 get job

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  62. Thnq..meru gk ki ye books lo prepare ayaru

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  63. yes,In previous year the people who score above 130 got job

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  64. boysinu mathramano? any girls who got exam center in TN?

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  65. % mark wrongly entered as 70 instead of 72 will it matter in interview

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  66. contact IBPS through helpline number.. They can help you....

    ReplyDelete
  67. Same here. I also have PO interview on 23rd and worried about the date of certificate verification
    If both co incides on same day then it would wreak havoc :/ :(

    ReplyDelete
  68. venkatesh gunaparthiJanuary 8, 2015 at 8:43 PM

    and certificate verification ki velte certificates handover cheseyaalata... so then we cannot attend clerks interview too... watt to doo... late ga piliste baguntundhi..

    ReplyDelete
  69. venkatesh gunaparthiJanuary 8, 2015 at 8:45 PM

    nenu asaluuu emii prepare avaledhu.... banks prepare avutunnanu...ee exam notification choosi apply chesaanu anthe... lucky ga vachindhi.. this is my first job...

    ReplyDelete
  70. bcoz no1 frm delhi :(

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  71. In the notification 160 posts for obc and 860 got selected for typing....but here only 105 selected in obc category...what abt remaining??

    ReplyDelete
  72. i wrote only rrb clerks

    ReplyDelete
  73. .candidates alloted ....@tamilnadu......wishing u all de very best.......and pls don't fed up....!!!!!

    ReplyDelete
  74. but you are..! feel unique

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  75. but it takes minimum 1yr for a candidate to get completely trained. what do they benefit from us?

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  76. How's ur preparation going?

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  77. Did u visit the venue of interview?

    ReplyDelete
  78. hving prblm in postin comments ..
    no i didnt go

    ReplyDelete
  79. Even I have experienced that...
    Kk then prepare well.

    ReplyDelete
  80. 3 days left for interview
    all the best..
    and plz share ur experience

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  81. Sure I will..
    U have applied for which category?

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  82. k....
    wat and all u prepared?

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  83. Not much i have had a glance at banking terminologies nothing more..

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  84. i qualified but it is not a good score. i got 120 only.

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  85. from ap ..oc... attempted 200

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  86. i do not have my final year mark sheet of graduation......I have done MBA. Is it absolutely necessary for interview to hv the mark sheet....please reply?

    ReplyDelete
  87. oh k.....
    have u faced any of the interviews til nw?

    ReplyDelete
  88. Nice post Gr8. Pls share some information on accountancy and economics for ibps po interviews. I am new to the site. Thanks.

    ReplyDelete
  89. hello
    hw many marks u got in clrk 4?

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  90. 3 marks more than u..
    99

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  91. Good score...
    In which u did not clear the sectional cut off

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  92. In which u did not clear cut off

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  93. Cut off not cleared in

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  94. hw much s the total cutoff?

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  95. Me too.. I'm in chennai & you..

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  96. visakhapatnam.what about you?

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  97. M selected from delhi

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  98. all the best ..
    do welll :)

    ReplyDelete
  99. Interview letter is out

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  100. yes, interview letter is out just now.

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  101. Friends Interview call letters are out...post ur interview date and time for those who were alloted chennai office...

    ReplyDelete
  102. interview call letters out

    ReplyDelete
  103. admin please upload quick ga for sbi associate clerck my exam on 24 january 2015

    ReplyDelete
  104. Hello sir,
    Very useful material for competitive exams, good job
    your material has been a great help in preparing competitive exams so far
    plz give Daily Current updates….like http://jobcracker.tk/

    ReplyDelete
  105. dear mam,
    I am qualified for IBPS clerk 4.In my application form i have kept 8 months work experience.Actually it was an online job,,,so I didnt get any experience certificate. Will there be any problem while going for the interview or during the verification process? Please help me maam,,,please give me a better solution....

    ReplyDelete
  106. mam,
    i have cleared ibps clerical-14 and having interview on feb 12th-2015
    but i made a mistake in uploading my degree aggregate marks.
    actual marks was 63.78% but i wrote it as 64.78%. will this cause
    a problem in selection process? pls help me how to come-out of this problem??

    ReplyDelete
  107. plz upload gk of january

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  108. please provide link for february 2015 current affairs

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  109. plz upload the current affiars monthly for january
    otherwise great work

    ReplyDelete
  110. ohhhhhh first time i opened this link though i m using BA from very long time

    ReplyDelete
  111. Super website. ...very useful
    But for SBI associate clerk exam quick reference current affairs update pdf is not prepared.
    I am waiting for that stuff because I have exam on 21st Feb.

    ReplyDelete
  112. pls answer
    goitre is caused due to deficiency of iodine.it is prevalent in??????the options are:-1.coastal areas 2.hilly areas 3.desert areas 4.n.o.t

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  113. where is vitamin -A mainly stored?

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  114. goitre is caused due to deficiency of iodine.it is prevalent in??????the options are:-1.coastal areas 2.hilly areas 3.desert areas 4.n.o.t

    ReplyDelete
  115. wat is the cut off for syndicate bank po for oc category

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  116. Plz kindly advice me for clearing any of one competitive exams...

    ReplyDelete
  117. Emandi Siva JyothiMarch 7, 2015 at 5:56 PM

    Can you please upload monthly pdf for Feb 2015?

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  118. Superb! Great Job by creating the jpg. much obliged!

    ReplyDelete
  119. plz upload detailed current affairs notes for month of feb 2015 .its already mid of march .plz mam upload as early as possible.

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  120. Plz upload Feb current affairs full PDF

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  121. Dear Faculty.
    We request you to please post the complete pdf of february's monthly GA.
    We are eagerlly waiting to get that.
    Plz make that available as soon as possible.

    And thanks for all your post. They are really helpful. Thanks again.

    ReplyDelete
  122. Please upload Feb current affair in pdf

    ReplyDelete

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