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-rw-r--r--src/launch-appliance.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/launch-appliance.c b/src/launch-appliance.c
index 328cd196..bad9cb70 100644
--- a/src/launch-appliance.c
+++ b/src/launch-appliance.c
@@ -942,11 +942,12 @@ qemu_drive_param (guestfs_h *g, const struct drive *drv, size_t index)
else
iface = "virtio";
- snprintf (&r[i], len-i, "%s%s%s%s,id=hd%zu,if=%s",
+ snprintf (&r[i], len-i, "%s%s%s%s%s,id=hd%zu,if=%s",
drv->readonly ? ",snapshot=on" : "",
drv->use_cache_none ? ",cache=none" : "",
drv->format ? ",format=" : "",
drv->format ? drv->format : "",
+ qemu_supports (g, "detect-zero") ? ",detect-zero=on" : "",
index,
iface);