diff --git a/pkg/compute/guestdrivers/kvm.go b/pkg/compute/guestdrivers/kvm.go
index febd017e1b..b731ba6dc3 100644
--- a/pkg/compute/guestdrivers/kvm.go
+++ b/pkg/compute/guestdrivers/kvm.go
@@ -90,8 +90,8 @@ func (self *SKVMGuestDriver) GetInstanceCapability() cloudprovider.SInstanceCapa
 			SysDisk: []cloudprovider.StorageInfo{
 				{
 					StorageType: api.STORAGE_LOCAL,
-					MinSizeGb:   30,
-					MaxSizeGb:   2048,
+					MinSizeGb:   options.Options.LocalSysDiskMinSizeGB,
+					MaxSizeGb:   options.Options.LocalSysDiskMaxSizeGB,
 					StepSizeGb:  1,
 					Resizable:   true,
 				},
diff --git a/pkg/compute/options/options.go b/pkg/compute/options/options.go
index 8ade0621ef..f0e4d5c57d 100644
--- a/pkg/compute/options/options.go
+++ b/pkg/compute/options/options.go
@@ -205,6 +205,9 @@ type ComputeOptions struct {
 	LocalDataDiskMinSizeGB int `help:"Data disk min size when using local storage" default:"10"`
 	LocalDataDiskMaxSizeGB int `help:"Data disk max size when using local storage" default:"40960"`
 
+	LocalSysDiskMinSizeGB int `help:"System disk min size when using local storage" default:"30"`
+	LocalSysDiskMaxSizeGB int `help:"System disk max size when using local storage" default:"2048"`
+
 	SkuMaxMemSize  int64 `help:"Sku max memory size GB" default:"1024"`
 	SkuMaxCpuCount int64 `help:"Sku max cpu count" default:"256"`