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authorbellard <bellard@c046a42c-6fe2-441c-8c8c-71466251a162>2006-08-07 21:34:34 +0000
committerbellard <bellard@c046a42c-6fe2-441c-8c8c-71466251a162>2006-08-07 21:34:34 +0000
commit19d36792c02e09941d9f3ef19b9461306cc54d76 (patch)
tree22c2783568ea095e42acc3a9e3c6fcedf492f6ad /qemu-img.texi
parentfixed aio emulation (diff)
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update
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2100 c046a42c-6fe2-441c-8c8c-71466251a162
Diffstat (limited to 'qemu-img.texi')
-rw-r--r--qemu-img.texi20
1 files changed, 12 insertions, 8 deletions
diff --git a/qemu-img.texi b/qemu-img.texi
index ac7923ffd..1f01dce16 100644
--- a/qemu-img.texi
+++ b/qemu-img.texi
@@ -29,16 +29,19 @@ is the disk image format. It is guessed automatically in most cases. The followi
@item raw
Raw disk image format (default). This format has the advantage of
-being simple and easily exportable to all other emulators. If your file
-system supports @emph{holes} (for example in ext2 or ext3 on Linux),
-then only the written sectors will reserve space. Use @code{qemu-img
-info} to know the real size used by the image or @code{ls -ls} on
-Unix/Linux.
+being simple and easily exportable to all other emulators. If your
+file system supports @emph{holes} (for example in ext2 or ext3 on
+Linux or NTFS on Windows), then only the written sectors will reserve
+space. Use @code{qemu-img info} to know the real size used by the
+image or @code{ls -ls} on Unix/Linux.
-@item qcow
+@item qcow2
QEMU image format, the most versatile format. Use it to have smaller
images (useful if your filesystem does not supports holes, for example
-on Windows), optional AES encryption and zlib based compression.
+on Windows), optional AES encryption, zlib based compression and
+support of multiple VM snapshots.
+@item qcow
+Old QEMU image format. Left for compatibility.
@item cow
User Mode Linux Copy On Write image format. Used to be the only growable
image format in QEMU. It is supported only for compatibility with
@@ -104,7 +107,8 @@ are detected and suppressed from the destination image.
Give information about the disk image @var{filename}. Use it in
particular to know the size reserved on disk which can be different
-from the displayed size.
+from the displayed size. If VM snapshots are stored in the disk image,
+they are displayed too.
@end table
@c man end