diff --git a/block/parallels.c b/block/parallels.c
index 645521d783e01e259bcad3ae30e82eac6b0c8f84..3f9fd48cc69bc1cc50bba3c39ebad9e7e257cfcc 100644
--- a/block/parallels.c
+++ b/block/parallels.c
@@ -479,7 +479,8 @@ static int parallels_create(const char *filename, QemuOpts *opts, Error **errp)
 
     file = NULL;
     ret = bdrv_open(&file, filename, NULL, NULL,
-                    BDRV_O_RDWR | BDRV_O_PROTOCOL, &local_err);
+                    BDRV_O_RDWR | BDRV_O_CACHE_WB | BDRV_O_PROTOCOL,
+                    &local_err);
     if (ret < 0) {
         error_propagate(errp, local_err);
         return ret;
diff --git a/block/qcow.c b/block/qcow.c
index 251910cc9dc3caf0143111487e8ede645442abac..c46810c56b99c9036a77f6ded0292658619de9c2 100644
--- a/block/qcow.c
+++ b/block/qcow.c
@@ -798,7 +798,8 @@ static int qcow_create(const char *filename, QemuOpts *opts, Error **errp)
 
     qcow_bs = NULL;
     ret = bdrv_open(&qcow_bs, filename, NULL, NULL,
-                    BDRV_O_RDWR | BDRV_O_PROTOCOL, &local_err);
+                    BDRV_O_RDWR | BDRV_O_CACHE_WB | BDRV_O_PROTOCOL,
+                    &local_err);
     if (ret < 0) {
         error_propagate(errp, local_err);
         goto cleanup;
diff --git a/block/qcow2.c b/block/qcow2.c
index 8babecdab242b8421cad8b649734784ce22e7732..5a79177546dc53be092cfe8cb55df37b8afe455c 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -2173,7 +2173,8 @@ static int qcow2_create2(const char *filename, int64_t total_size,
     }
 
     bs = NULL;
-    ret = bdrv_open(&bs, filename, NULL, NULL, BDRV_O_RDWR | BDRV_O_PROTOCOL,
+    ret = bdrv_open(&bs, filename, NULL, NULL,
+                    BDRV_O_RDWR | BDRV_O_CACHE_WB | BDRV_O_PROTOCOL,
                     &local_err);
     if (ret < 0) {
         error_propagate(errp, local_err);
diff --git a/block/sheepdog.c b/block/sheepdog.c
index 05677ed983e96e6454bf569596f0ad16a73fa6c0..2488a8e67db826b0a02c65c89f6d4fd02706edd9 100644
--- a/block/sheepdog.c
+++ b/block/sheepdog.c
@@ -1645,7 +1645,8 @@ static int sd_prealloc(const char *filename, Error **errp)
     void *buf = NULL;
     int ret;
 
-    ret = bdrv_open(&bs, filename, NULL, NULL, BDRV_O_RDWR | BDRV_O_PROTOCOL,
+    ret = bdrv_open(&bs, filename, NULL, NULL,
+                    BDRV_O_RDWR | BDRV_O_CACHE_WB | BDRV_O_PROTOCOL,
                     errp);
     if (ret < 0) {
         goto out_with_err_set;
@@ -1838,7 +1839,8 @@ static int sd_create(const char *filename, QemuOpts *opts,
         }
 
         bs = NULL;
-        ret = bdrv_open(&bs, backing_file, NULL, NULL, BDRV_O_PROTOCOL, errp);
+        ret = bdrv_open(&bs, backing_file, NULL, NULL,
+                        BDRV_O_PROTOCOL | BDRV_O_CACHE_WB, errp);
         if (ret < 0) {
             goto out;
         }
diff --git a/block/vdi.c b/block/vdi.c
index b40324360435c3a69ce2357ce2d8f3ea71835644..12407c43e96cf650f35942469ccb836e5bf195b0 100644
--- a/block/vdi.c
+++ b/block/vdi.c
@@ -766,7 +766,8 @@ static int vdi_create(const char *filename, QemuOpts *opts, Error **errp)
         error_propagate(errp, local_err);
         goto exit;
     }
-    ret = bdrv_open(&bs, filename, NULL, NULL, BDRV_O_RDWR | BDRV_O_PROTOCOL,
+    ret = bdrv_open(&bs, filename, NULL, NULL,
+                    BDRV_O_RDWR | BDRV_O_CACHE_WB | BDRV_O_PROTOCOL,
                     &local_err);
     if (ret < 0) {
         error_propagate(errp, local_err);
diff --git a/block/vhdx.c b/block/vhdx.c
index 9a51428317ab24562e2d03b6b4e357d977b0be86..ea030ad5093ad5b40fcdcdd37a82e2cf804eaa96 100644
--- a/block/vhdx.c
+++ b/block/vhdx.c
@@ -1838,7 +1838,8 @@ static int vhdx_create(const char *filename, QemuOpts *opts, Error **errp)
     }
 
     bs = NULL;
-    ret = bdrv_open(&bs, filename, NULL, NULL, BDRV_O_RDWR | BDRV_O_PROTOCOL,
+    ret = bdrv_open(&bs, filename, NULL, NULL,
+                    BDRV_O_RDWR | BDRV_O_CACHE_WB | BDRV_O_PROTOCOL,
                     &local_err);
     if (ret < 0) {
         error_propagate(errp, local_err);
diff --git a/block/vmdk.c b/block/vmdk.c
index 03be7f0f5fd6bc48eb1eec447f7e216a9649a045..dd8093688a15df7314f03ad25fc5f50c23cdcef9 100644
--- a/block/vmdk.c
+++ b/block/vmdk.c
@@ -1664,7 +1664,8 @@ static int vmdk_create_extent(const char *filename, int64_t filesize,
     }
 
     assert(bs == NULL);
-    ret = bdrv_open(&bs, filename, NULL, NULL, BDRV_O_RDWR | BDRV_O_PROTOCOL,
+    ret = bdrv_open(&bs, filename, NULL, NULL,
+                    BDRV_O_RDWR | BDRV_O_CACHE_WB | BDRV_O_PROTOCOL,
                     &local_err);
     if (ret < 0) {
         error_propagate(errp, local_err);
@@ -1944,7 +1945,8 @@ static int vmdk_create(const char *filename, QemuOpts *opts, Error **errp)
             ret = -ENOENT;
             goto exit;
         }
-        ret = bdrv_open(&bs, full_backing, NULL, NULL, BDRV_O_NO_BACKING, errp);
+        ret = bdrv_open(&bs, full_backing, NULL, NULL,
+                        BDRV_O_NO_BACKING | BDRV_O_CACHE_WB, errp);
         g_free(full_backing);
         if (ret != 0) {
             goto exit;
@@ -2015,7 +2017,8 @@ static int vmdk_create(const char *filename, QemuOpts *opts, Error **errp)
     }
     assert(new_bs == NULL);
     ret = bdrv_open(&new_bs, filename, NULL, NULL,
-                    BDRV_O_RDWR | BDRV_O_PROTOCOL, &local_err);
+                    BDRV_O_RDWR | BDRV_O_CACHE_WB | BDRV_O_PROTOCOL,
+                    &local_err);
     if (ret < 0) {
         error_propagate(errp, local_err);
         goto exit;
diff --git a/block/vpc.c b/block/vpc.c
index 318e6d66fbf6d417bd018817d2f76ae84560e5f4..1db47d63ba67f1efb72bb0cc1f51e618ee61aab6 100644
--- a/block/vpc.c
+++ b/block/vpc.c
@@ -886,7 +886,8 @@ static int vpc_create(const char *filename, QemuOpts *opts, Error **errp)
         error_propagate(errp, local_err);
         goto out;
     }
-    ret = bdrv_open(&bs, filename, NULL, NULL, BDRV_O_RDWR | BDRV_O_PROTOCOL,
+    ret = bdrv_open(&bs, filename, NULL, NULL,
+                    BDRV_O_RDWR | BDRV_O_CACHE_WB | BDRV_O_PROTOCOL,
                     &local_err);
     if (ret < 0) {
         error_propagate(errp, local_err);