Index: xen-4.0.0-testing/tools/blktap/drivers/tapdisk.h
===================================================================
--- xen-4.0.0-testing.orig/tools/blktap/drivers/tapdisk.h
+++ xen-4.0.0-testing/tools/blktap/drivers/tapdisk.h
@@ -168,7 +168,7 @@ static disk_info_t aio_disk = {
 	"raw image (aio)",
 	"aio",
 	0,
-	0,
+	1,
 #ifdef TAPDISK
 	&tapdisk_aio,
 #endif
@@ -179,7 +179,7 @@ static disk_info_t sync_disk = {
 	"raw image (sync)",
 	"sync",
 	0,
-	0,
+	1,
 #ifdef TAPDISK
 	&tapdisk_sync,
 #endif
@@ -190,7 +190,7 @@ static disk_info_t vmdk_disk = {
 	"vmware image (vmdk)",
 	"vmdk",
 	1,
-	0,
+	1,
 #ifdef TAPDISK
 	&tapdisk_vmdk,
 #endif
@@ -212,7 +212,7 @@ static disk_info_t qcow_disk = {
 	"qcow disk (qcow)",
 	"qcow",
 	0,
-	0,
+	1,
 #ifdef TAPDISK
 	&tapdisk_qcow,
 #endif
@@ -223,7 +223,7 @@ static disk_info_t qcow2_disk = {
 	"qcow2 disk (qcow2)",
 	"qcow2",
 	0,
-	0,
+	1,
 #ifdef TAPDISK
 	&tapdisk_qcow2,
 #endif