Updates from April, 2007 Toggle Comment Threads | Keyboard Shortcuts

  • Harshad Joshi 11:16 am on April 7, 2007 Permalink | Reply  

    Magnetic Media 

    One of the most common ways to transport data from one computer to another is to write them onto magnetic tape or removable media (e.g., recordable DVDs), physically transport the tape or disks to the destination machine, and read them back in again. Although this method is not as sophisticated as using a geosynchronous communication satellite, it is often more cost effective, especially for applications in which high bandwidth or cost per bit transported is the key factor.

    A simple calculation will make this point clear. An industry standard Ultrium tape can hold 200 gigabytes. A box 60 x 60 x 60 cm can hold about 1000 of these tapes, for a total capacity of 200 terabytes, or 1600 terabits (1.6 petabits). A box of tapes can be delivered anywhere in the United States in 24 hours by Federal Express and other companies. The effective bandwidth of this transmission is 1600 terabits/86,400 sec, or 19 Gbps. If the destination is only an hour away by road, the bandwidth is increased to over 400 Gbps. No computer network can even approach this.

    For a bank with many gigabytes of data to be backed up daily on a second machine (so the bank can continue to function even in the face of a major flood or earthquake), it is likely that no other transmission technology can even begin to approach magnetic tape for performance. Of course, networks are getting faster, but tape densities are increasing, too.

    If we now look at cost, we get a similar picture. The cost of an Ultrium tape is around $40 when bought in bulk. A tape can be reused at least ten times, so the tape cost is maybe $4000 per box per usage. Add to this another $1000 for shipping (probably much less), and we have a cost of roughly $5000 to ship 200 TB. This amounts to shipping a gigabyte for under 3 cents. No network can beat that. The moral of the story is:

    Never underestimate the bandwidth of a station wagon full of tapes hurtling down the highway.

     
    • Desktopjunk 6:53 pm on April 22, 2007 Permalink | Reply

      Thanks, always good posts on your blog!

    • Jagdish Doshi 11:03 am on November 2, 2007 Permalink | Reply

      Date: 2nd Nov, 2007

      Dear Sir,
      We take this opportunity to introduce our selves that we are into trade of Customs, Port and Airport Auction. We have in stock few Data Cartridge. Details of the Product is given below. Kindly have a look at it.

      Desc: Data Cartridge Ultrium LTO 3
      Make: Sun Microsystem
      Capacity: 400/800 Gb

      Our contact details are as follows
      Fortune International
      Mr. Jagdish Doshi/ Mr. Premal Doshi
      Tel: 022 25130387
      Mobile: 9820120385 / 9820737564
      email: fortune_in@hotmail.com

      Thanking you,
      Regards
      For Fortune International
      Prop. Jagdish Doshi

  • Harshad Joshi 5:59 pm on April 2, 2007 Permalink | Reply
    Tags: Bangalore, Centrino, Hyderabad, , Intel, Intel Centrino, Laptops, , Wi-fi, Wimax, Wireless   

    Unwiring Pune – Indias first Wi-Max enabled city 

    Finally its there. The ‘Unwiring Pune’ project has kicked off.. This new wirefree access utilizes WiMAX (Worldwide Interoperability for Microwave Access) and Wi-Fi (Wireless Fidelity) technologies to equip Pune with high-speed wireless internet. Wireless connectivity will allow people to access the Internet through a laptop or personal digital assistant (PDA), sans the need for cables. WiMAX is claimed to be the most cost-efficient way of building wireless data networks and a means to link people over large distances for “last mile” connectivity and bridging the digital divide. Taking a leap over Bangalore and Hyderabad, Pune will become the first Indian city to have a high-speed wireless Internet network even before the Centre’s much-awaited spectrum policy is announced. Initially Pune did had a demo of wireless internet access on Walking Plaza, but today, this project has finally taken off in grand style. Streaming, broadband access and that too with ease and convinience is sure to rock Pune. Imagine the power of Broadband without the hassles of wires..

    What more can I say? Its true that Pune was coming in news for all the wrong reasons(rave parties, orkut misuse etc), but now I think that this news makes one feel good….Similar kind of service is provided by the search engine giant Google in San Francisco. Now we are at par with the developed regions in some departments, if not all, but that shouldent stop us from being happy..

    Q. What is WiMAX?

    A. WiMAX (World Interoperability for Microwave Access), based on the IEEE 802.16 standard, is expected to enable true broadband speeds over wireless networks at a cost point to enable mass market adoption. WiMAX is the only wireless standard today that has the ability to deliver true broadband speeds and help make the vision of pervasive connectivity a reality.

    There are two main applications of WiMAX today: fixed WiMAX applications are point-to-multipoint enabling broadband access to homes and businesses, whereas mobile WiMAX offers the full mobility of cellular networks at true broadband speeds. Both fixed and mobile applications of WiMAX are engineered to help deliver ubiquitous, high-throughput broadband wireless services at a low cost.

    Intel currently plans to integrate WiMAX and WiFi into its notebook platforms based on Intel® Centrino® Mobile Technologies. Pairing the two will help bring users the ultimate in high-speed mobile broadband. Intel believes that WiMAX, with its technical and economic advantages, should help enable mainstream adoption of personal broadband.

    Moral of the story – Get a laptop having Intel Centrino Mobile Technology.. 😀

    Update : 23 April 2008 – No further development and this project seems to have lost momentum

     
    • BD 6:45 pm on April 2, 2007 Permalink | Reply

      Wow that’s great news! It’d be great if you could link to some sources that talk more about this project.

    • Vinod Ponmanadiyil 2:16 pm on April 3, 2007 Permalink | Reply

      The Bangalore Unwired Project kicked off early – as usual. But tangled in the beaurocratic-tapes – as usual.

    • Harshad Joshi 6:24 pm on April 3, 2007 Permalink | Reply

      For a looong time bangalore has been getting attention and resources, but now its time that the overhyped city gets a break..its too much crowded..

      East or west..Pune is the BEST, and soon, Pune will overtake the world..Watch it.

    • suresh patil 7:05 am on April 4, 2007 Permalink | Reply

      its really get dat ,,….people…use it ..we have no more time 2 spend ..its better dat we can access net from anywhere …..in any place ….

      thx

    • Rashmi 7:38 pm on April 10, 2007 Permalink | Reply

      Can i Apply for it.I m 2007 passout fresher I.T. engineer

    • Madhu 10:06 am on April 11, 2007 Permalink | Reply

      Its indeed great that…….pune is grabbing attention of all…….and soon i am sure it will overtake…..bangalore and become the IT hub of india

    • Harshad Joshi 6:37 pm on April 11, 2007 Permalink | Reply

      @Madhu
      Pune holds the power to be the IT and educational epicenter of the entire world, not just India.

    • Harshad Joshi 6:39 pm on April 11, 2007 Permalink | Reply

      @Rashmi
      Huh? I doubt your ‘IT’ skills… 😀

    • harish 2:13 pm on July 25, 2007 Permalink | Reply

      hi nice job
      think collage guys r eagerly waiting for the bike

    • hudson 6:40 am on September 3, 2007 Permalink | Reply

      Wow that’s great news!Can i Apply for it.I m 2007 passout fresher For a looong time chennai Annagar has been getting attention and resources, to me

    • hudson 6:44 am on September 3, 2007 Permalink | Reply

      whery naice bike more am also waiting for the bike

    • satish sharma 2:46 pm on April 5, 2008 Permalink | Reply

      nice bike of yahama 165cc as compair herohonda cbz, apachi and bajaj pulusr dtsi.

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