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<p>
<a href="Documentation.html">Documentation</a>
<img src="arrow_right.gif" alt=">>" style="margin-top: 5px">
<a href="VeraCrypt%20Volume.html">VeraCrypt Volume</a>
<img src="arrow_right.gif" alt=">>" style="margin-top: 5px">
<a href="Creating%20New%20Volumes.html">Creating New Volumes</a>
@@ -42,41 +42,41 @@
from the system (for more information, please see the section <a href="Random%20Number%20Generator.html">
<em>Random Number Generator</em></a>). The Wizard provides help and information necessary to successfully create a new VeraCrypt volume. However, several items deserve further explanation:</p>
<h3>Hash Algorithm</h3>
<p>Allows you to select which hash algorithm VeraCrypt will use. The selected hash algorithm is used by the random number generator (as a pseudorandom mixing function), which generates the master key, secondary key (XTS mode), and salt (for more information,
please see the section <a href="Random%20Number%20Generator.html">
<em>Random Number Generator</em></a>). It is also used in deriving the new volume header key and secondary header key (see the section
<a href="Header%20Key%20Derivation.html">
<em>Header Key Derivation, Salt, and Iteration Count</em></a>).<br>
<br>
For information about the implemented hash algorithms, see the chapter <a href="Hash%20Algorithms.html">
<em>Hash Algorithms.</em></a><br>
<br>
Note that the output of a hash function is <em>never </em>used directly as an encryption key. For more information, please refer to the chapter
<a href="Technical%20Details.html"><em>Technical Details</em></a>.</p>
<h3>Encryption Algorithm</h3>
<p>This allows you to select the encryption algorithm with which your new volume will be encrypted. Note that the encryption algorithm cannot be changed after the volume is created. For more information, please see the chapter
<a href="Encryption%20Algorithms.html"><em>Encryption Algorithms</em></a>.</p>
<h3 id="QuickFormat">Quick Format</h3>
<p>If unchecked, each sector of the new volume will be formatted. This means that the new volume will be
<em>entirely </em>filled with random data. Quick format is much faster but may be less secure because until the whole volume has been filled with files, it may be possible to tell how much data it contains (if the space was not filled with random data beforehand).
- If you are not sure whether to enable or disable Quick Format, we recommend that you leave this option unchecked. Note that Quick Format can only be enabled when encrypting partitions/devices.</p>
+ If you are not sure whether to enable or disable Quick Format, we recommend that you leave this option unchecked. Note that Quick Format can only be enabled when encrypting partitions/devices, except on Windows where it is also available when creating file containers.</p>
<p>Important: When encrypting a partition/device within which you intend to create a hidden volume afterwards, leave this option unchecked.</p>
<h3 id="dynamic">Dynamic</h3>
<p>Dynamic VeraCrypt container is a pre-allocated NTFS sparse file whose physical size (actual disk space used) grows as new data is added to it. Note that the physical size of the container (actual disk space that the container uses) will not decrease when
files are deleted on the VeraCrypt volume. The physical size of the container can only
<em>increase </em>up to the maximum value that is specified by the user during the volume creation process. After the maximum specified size is reached, the physical size of the container will remain constant.<br>
<br>
Note that sparse files can only be created in the NTFS file system. If you are creating a container in the FAT file system, the option
<em>Dynamic </em>will be disabled (&ldquo;grayed out&rdquo;).<br>
<br>
Note that the size of a dynamic (sparse-file-hosted) VeraCrypt volume reported by Windows and by VeraCrypt will always be equal to its maximum size (which you specify when creating the volume). To find out current physical size of the container (actual disk
space it uses), right-click the container file (in a Windows Explorer window, not in VeraCrypt), then select
<em>Properties </em>and see the Size on disk value.</p>
<p>WARNING: Performance of dynamic (sparse-file-hosted) VeraCrypt volumes is significantly worse than performance of regular volumes. Dynamic (sparse-file-hosted) VeraCrypt volumes are also less secure, because it is possible to tell which volume sectors are
unused. Furthermore, if data is written to a dynamic volume when there is not enough free space in its host file system, the encrypted file system may get corrupted.</p>
<h3>Cluster Size</h3>
<p>Cluster is an allocation unit. For example, one cluster is allocated on a FAT file system for a one- byte file. When the file grows beyond the cluster boundary, another cluster is allocated. Theoretically, this means that the bigger the cluster size, the
more disk space is wasted; however, the better the performance. If you do not know which value to use, use the default.</p>
<h3>VeraCrypt Volumes on CDs and DVDs</h3>
<p>If you want a VeraCrypt volume to be stored on a CD or a DVD, first create a file-hosted VeraCrypt container on a hard drive and then burn it onto a CD/DVD using any CD/DVD burning software (or, under Windows XP or later, using the CD burning tool provided
with the operating system). Remember that if you need to mount a VeraCrypt volume that is stored on a read-only medium (such as a CD/DVD) under Windows 2000, you must format the VeraCrypt volume as FAT. The reason is that Windows 2000 cannot mount NTFS file