From: Kevin Wolf <kw...@redhat.com> The limit of qcow2 files at least depends on the cluster size. If the image format has a cluster_size option, suggest to increase it.
Signed-off-by: Kevin Wolf <kw...@redhat.com> Signed-off-by: Stefan Hajnoczi <stefa...@redhat.com> --- block.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/block.c b/block.c index aa9a533..3f87489 100644 --- a/block.c +++ b/block.c @@ -4857,8 +4857,12 @@ void bdrv_img_create(const char *filename, const char *fmt, error_setg(errp,"Formatting or formatting option not supported for " "file format '%s'", fmt); } else if (ret == -EFBIG) { - error_setg(errp, "The image size is too large for file format '%s'", - fmt); + const char *cluster_size_hint = ""; + if (get_option_parameter(create_options, BLOCK_OPT_CLUSTER_SIZE)) { + cluster_size_hint = " (try using a larger cluster size)"; + } + error_setg(errp, "The image size is too large for file format '%s'%s", + fmt, cluster_size_hint); } else { error_setg(errp, "%s: error while creating %s: %s", filename, fmt, strerror(-ret)); -- 1.8.1.4