From 11b6699af59b8684128debacfc7c44cbaa6ac53b Mon Sep 17 00:00:00 2001 From: Peter Lieven Date: Thu, 24 Oct 2013 12:07:05 +0200 Subject: qemu-img: add support for fully allocated images Signed-off-by: Peter Lieven Signed-off-by: Stefan Hajnoczi --- qemu-img.texi | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'qemu-img.texi') diff --git a/qemu-img.texi b/qemu-img.texi index 768054e900..da36975d70 100644 --- a/qemu-img.texi +++ b/qemu-img.texi @@ -193,6 +193,12 @@ Image conversion is also useful to get smaller image when using a growable format such as @code{qcow} or @code{cow}: the empty sectors are detected and suppressed from the destination image. +@var{sparse_size} indicates the consecutive number of bytes (defaults to 4k) +that must contain only zeros for qemu-img to create a sparse image during +conversion. If @var{sparse_size} is 0, the source will not be scanned for +unallocated or zero sectors, and the destination image will always be +fully allocated. + You can use the @var{backing_file} option to force the output image to be created as a copy on write image of the specified base image; the @var{backing_file} should have the same content as the input's base image, -- cgit v1.2.3