Difference between pages "QCOW Image Format" and "Virtual Hard Disk (VHD)"

From ForensicsWiki
(Difference between pages)
Jump to: navigation, search
 
 
Line 1: Line 1:
[[QEMU]] uses the '''QEMU Copy-On-Write (QCOW)''' files to store a disk image.
+
{{expand}}
  
== MIME types ==
+
== Image types ==
 +
* Fixed-size hard disk image
 +
* Dynamic-size (or sparse) hard disk image
 +
* Differencing hard disk image
  
== File signature ==
+
== External Links ==
QCOW files start with hexadecimal: 0x51 0x46 0x49 0xfb (ASCII: "QFI.")
+
  
== File types ==
+
* [http://en.wikipedia.org/wiki/VHD_(file_format) VHD (file format)], by Wikipedia
Currently there two are versions of the QCOW format; version 1 and 2. Version 2 is the preferred format.
+
* [http://technet.microsoft.com/en-us/library/bb676673.aspx Virtual Hard Disk Image Format Specification], by Microsoft
 
+
== Contents ==
+
The QCOW format is used to store storage media data, e.g. disk images.
+
 
+
The QCOW image file consists of:
+
* the file header
+
* the L1 table (cluster aligned)
+
* the reference count table (cluster aligned)
+
* reference count blocks
+
* snapshot headers (8-byte aligned on cluster boundary)
+
* clusters containing:
+
** L2 tables
+
** storage media data
+
 
+
The clusters are 512 bytes of size
+
 
+
== Encryption ==
+
The QCOW2 format supports optional AES encryption
+
 
+
== See Also ==
+
* [[Disk Images]]
+
 
+
== External Links ==
+
  
* [http://people.gnome.org/~markmc/qcow-image-format-version-1.html The QCOW Image Format]
 
* [http://people.gnome.org/~markmc/qcow-image-format.html The QCOW2 Image Format]
 
  
 
[[Category:File Formats]]
 
[[Category:File Formats]]

Revision as of 03:19, 13 September 2012

Information icon.png

Please help to improve this article by expanding it.
Further information might be found on the discussion page.

Image types

  • Fixed-size hard disk image
  • Dynamic-size (or sparse) hard disk image
  • Differencing hard disk image

External Links