OS-LAB-using-JavaScript/index.html at master · KhushiGarg21/OS-LAB-using-JavaScript · GitHub

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<!-- https://www.w3schools.com/howto/howto_js_navbar_sticky.asp-->
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<head>
    <title>Disk Scheduling</title>
    <link rel="stylesheet" href="home.css">
    <link rel="shortcut icon" href="logo.png">
    <!-- <script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/js/bootstrap.bundle.min.js"></script> -->
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    <!--navbar-->
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    <img id="logo" src="logo.png" >
    <a class="navbar-brand" href="index.html">Disk Scheduling</a>
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<div class="content">
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    <div class="block1">
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        <div class="heading">
            <h1 style="text-align: center;">DISK SCHEDULING</h1>
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        <div class="typing">
            <!-- <h2 class="include-k">Includes: </h2>  -->
            <span  id="n" class="type-writer"  data-wait="2000"
                data-words='["FCFS", "SSTF", "SCAN", "C-SCAN", "LOOK", "C-LOOK"]'></span>
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        <h1 style="margin: 0px;">About</h1>
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        <p>A process needs two type of time, CPU time and IO time.</p>
        <p>For I/O,it requests the Operating system to access the disk.</p>
        <p>Disk scheduling is done by operating systems to schedule I/O requests arriving for the disk.</p>
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    <div class="infocard">
    <p style="font-weight: 700;">Disk Scheduling is important because:</p>
    <p>1. Multiple I/O requests may arrive by different processes and only one I/O requests can be served at a time by the disk controller.Thus other I/O requests need to wait in the waiting queue and need to be scheduled.</p>
    <p>2.Two or more request may be far from each other so can result in the greater disk arm movement.</p>
    <p>3.Hard drives need to be acessed in an efficient manner as they are the slowest parts of the computer system.</p>
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        <p style="font-weight: 700;">Some of the important terms:</p>
        <p style="font-weight: 700;">Seek Time:</p>
        <p>Seek time is the time taken to locate the disk arm to a specified track where the data is to be read or write. So the disk scheduling algorithm that gives minimum average seek time is better.</p>
        <p style="font-weight: 700;">Rotational Latency:</p>
        <p>Rotational Latency is the time taken by the desired sector of disk to rotate into a position so that it can access the read/write heads. The disk scheduling algorithm that gives minimum rotational latency is better.</p>
        <p style="font-weight: 700;">Transfer Time:</p>
        <p> Transfer time is the time to transfer the data. It depends on the rotating speed of the disk and number of bytes to be transferred.</p>
        <p style="font-weight: 700;">Disk Access Time = Seek Time + Rotational Latency + Tranfer time</p>
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    <div class="about-k">
        <h1> Algorithms </h1>
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            <a class="card-title" href="fcfs.html">FCFS </a>
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            <p>Requests are served in the order that they arrive.</p>
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    <div class="card">
        <a class="card-title" href="sstf.html">SSTF</a>
        <div class="card-text">
            <p>Request with lowest seek time is executed first.</p>
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    </div>

    <div class="card">
        <a class="card-title" href="scan.html">SCAN</a>
        <div class="card-text">
            <p>All requests arriving in the path are addressed. Head moves till the end
                track.</p>
        </div>
    </div>

    <div class="card">
        <a class="card-title" href="cscan.html">C-SCAN </a>
        <div class="card-text">
            <p>Similar to that of SCAN. Requests are addressed when the head moves in a
                single direction.</p>
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    </div>

    <div class="card">
        <a class="card-title" href="look.html">LOOK </a>
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            <p>Similar to SCAN, but the head moves only till the last request.</p>
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    </div>

    <div class="card">
        <a class="card-title" href="clook.html">C-LOOK</a>
        <div class="card-text">
            <p>Similar to C-SCAN, but the head moves only till the first and last request.</p>
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