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<p>on some storage hardware that works better with contiguous blocks such as <a href="page.php?w=Hard_disk_drive">hard disk drives</a>. Other hardware such as <a href="page.php?w=Solid-state_drive">solid-state drives</a> are not affected by fragmentation.</p>

<p><big> Access control </big></p>
<p>A file system often supports access control of data that it manages.</p>

<p>The intent of access control is often to prevent certain users from reading or modifying certain files.</p>

<p>Access control can also restrict access by program to ensure that data is</p><p>
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