Flash Translation layer(FTL): Difference between revisions

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     <h2>Contents <a href="javascript:void(0);" class="hide-link" onclick="toggleTOC()">[hide]</a></h2>
     <h2>Contents <a href="javascript:void(0);" class="hide-link" onclick="toggleTOC()">[hide]</a></h2>
     <ul>
     <ul>
        <li><a href="#section0">What tools you will need</a>
      <li><a href="#section1">Background information</a></li>
            <ul>
                <li><a href="#required">Required</a></li>
                <li><a href="#optional">Optional but useful</a></li>
            </ul>
        </li>
        <li><a href="#section1"> Uses of this skill</a></li>
         <li><a href="#section2"> Step-by-step guide with images</a></li>
         <li><a href="#section2"> Step-by-step guide with images</a></li>
         <li><a href="#section3"> Flow chart of order of operations</a></li>
         <li><a href="#section3"> Flow chart of order of operations</a></li>
        <li><a href="#section4"> Troubleshooting/tips and tricks</a></li>
         <li><a href="#section5"> Related Topics</a></li>
         <li><a href="#section5"> Related Topics</a></li>
         <li><a href="#section6"> Further reading</a></li>
         <li><a href="#section6"> Further reading</a></li>
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</div>
</div>


<h1> Background information </h1>
<h1 id="section1" >Background information </h1>
<p> The Flash Translation Layer acts as the name suggests a translation layer between the physical NAND chips and the digital operating system that runs from them.</br>
<p> The Flash Translation Layer acts as the name suggests a translation layer between the physical NAND chips and the digital operating system that runs from them.</br>
The following pages of this segment go into deeper detail of each aspect of the FTL, but an overview of each aspect are as follows
The following pages of this segment go into deeper detail of each aspect of the FTL, but an overview of each aspect are as follows
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</br> but are now unused. or need to store different information.</li>
</br> but are now unused. or need to store different information.</li>
<li>Block Reclamation- is responsible for moving blocks back to the list of avaible space after Garbage collection has erased them</li>
<li>Block Reclamation- is responsible for moving blocks back to the list of avaible space after Garbage collection has erased them</li>
<h1 id="section0">What tools you will need</h1>
<i> Items are not listed in any particular order </i>
<div class="infobox">
    <table>
        <tr></tr>
        <tr>
            <h3 id="required">Required</h3>
            <ul>
                <li>Test</li>
            </ul>
        </tr>
        <tr>
          <h3 id="optional">Optional but useful</h3>
            <ul>
                <li>Test</li>
            </ul>
        </tr>
    </table>
</div>
<h1 id="section1">Uses of this skill</h1>
<ul>
<li>1.test</li>
<li>2.test</li>
<li>3.test</li>
<h1 id="section2">Step-by-step guide with images</h1>
<p>Insert step-by-step walkthrough with images and summary text here</p>


<h1 id="section3">Flow chart of order of operations</h1>
<h1 id="section3">Flow chart of order of operations</h1>
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<div class="reference-list">
<div class="reference-list">
     <ol>
     <ol>
         <li>Reference 1: <a href="#">Source details</a></li>
         <li>Reference 1: <a href="https://www.adreca.net/NAND-Flash-Data-Recovery-Cookbook.pdf">NAND flash data recovery cookbook</a></li>
         <li>Reference 2: <a href="#">Source details</a></li>
         <li>Reference 2: <a href="#">Source details</a></li>
     </ol>
     </ol>

Revision as of 14:18, 14 January 2025

Data Recovery Resources

Background information

The Flash Translation Layer acts as the name suggests a translation layer between the physical NAND chips and the digital operating system that runs from them.
The following pages of this segment go into deeper detail of each aspect of the FTL, but an overview of each aspect are as follows

  • Block Mapping - Is responsible for mapping the digital data to the physical location on the chip dies
    since there is not always(if ever) 1:1 relation to where data is stored digital and where it is storaged digitally.
  • Wear Levelling- Due to the nature of how Nand functions each cell within the chip has a limited lifespan,
    wear leveling prevent execes wear on certain areas
  • Bad Block Management - Once a area does have excess wear or simply does not function correctly
    its located is noted by the FTL and not used with the digital addresses being relocated to a healthy area of the storage
  • Garbage collection- as the name suggests this aspect is responible for clearing blocks that have previously been written too
    but are now unused. or need to store different information.
  • Block Reclamation- is responsible for moving blocks back to the list of avaible space after Garbage collection has erased them

    • Flow chart of order of operations

    Insert a flow chart of steps and actions for each task (create using diagram)

    Troubleshooting/tips and tricks

    Fixes to any common issues that were encountered or could be easily encountered

    Related Topics

    Topics such as desoldering to chip off or firmware dumping for disk PCB repairs

    Further reading

    External references in wiki references can just be cited through the keyword link

    1. Reference 1: NAND flash data recovery cookbook
    2. Reference 2: Source details

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