diff --git a/pkg/compute/options/options.go b/pkg/compute/options/options.go
index c6c5c515a3..4cd32c0246 100644
--- a/pkg/compute/options/options.go
+++ b/pkg/compute/options/options.go
@@ -90,7 +90,7 @@ type ComputeOptions struct {
 	DefaultVpcQuota  int `default:"500" help:"Common vpc quota per domain, default 500"`
 
 	DefaultDiskDriver    string `help:"default disk driver" choices:"scsi|virtio|ide" default:"scsi"`
-	DefaultDiskCacheMode string `help:"default kvm disk cache mode" choices:"writeback|none|writethrough" default:"writeback"`
+	DefaultDiskCacheMode string `help:"default kvm disk cache mode" choices:"writeback|none|writethrough" default:"none"`
 
 	SystemAdminQuotaCheck         bool `help:"Enable quota check for system admin, default False" default:"false"`
 	CloudaccountHealthStatusCheck bool `help:"Enable cloudaccount health status check, default True" default:"true"`