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| author | Peter Lieven | 2013-10-24 12:07:05 +0200 |
|---|---|---|
| committer | Kevin Wolf | 2013-11-28 10:30:52 +0100 |
| commit | 11b6699af59b8684128debacfc7c44cbaa6ac53b (patch) | |
| tree | 631f7f7c1a398d2868fcb3cd3c719058a0173682 /qemu-img.texi | |
| parent | block/get_block_status: fix BDRV_BLOCK_ZERO for unallocated blocks (diff) | |
| download | qemu-11b6699af59b8684128debacfc7c44cbaa6ac53b.tar.gz qemu-11b6699af59b8684128debacfc7c44cbaa6ac53b.tar.xz qemu-11b6699af59b8684128debacfc7c44cbaa6ac53b.zip | |
qemu-img: add support for fully allocated images
Signed-off-by: Peter Lieven <pl@kamp.de>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'qemu-img.texi')
| -rw-r--r-- | qemu-img.texi | 6 |
1 files changed, 6 insertions, 0 deletions
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, |