diff --git a/pkg/compute/guestdrivers/esxi.go b/pkg/compute/guestdrivers/esxi.go
index 51008d9ede..58bccfe669 100644
--- a/pkg/compute/guestdrivers/esxi.go
+++ b/pkg/compute/guestdrivers/esxi.go
@@ -166,12 +166,15 @@ func (self *SESXiGuestDriver) ChooseHostStorage(host *models.SHost, guest *model
 		if err != nil {
 			return nil, errors.Wrapf(err, "unable to fetch Guest of InstanceSnapshot %q", ispId)
 		}
-		storages := ispGuest.GetStorages()
+		storages, err := ispGuest.GetStorages()
+		if err != nil {
+			return nil, errors.Wrapf(err, "GetStorages")
+		}
 		if len(storages) == 0 {
 			return self.SVirtualizedGuestDriver.ChooseHostStorage(host, guest, diskConfig, storageIds)
 		}
 		if utils.IsInStringArray(storages[0].GetId(), storageIds) {
-			return storages[0], nil
+			return &storages[0], nil
 		}
 		return self.SVirtualizedGuestDriver.ChooseHostStorage(host, guest, diskConfig, storageIds)
 	}
@@ -211,8 +214,31 @@ func (self *SESXiGuestDriver) GetChangeConfigStatus(guest *models.SGuest) ([]str
 }
 
 func (self *SESXiGuestDriver) ValidateChangeConfig(ctx context.Context, userCred mcclient.TokenCredential, guest *models.SGuest, cpuChanged bool, memChanged bool, newDisks []*api.DiskConfig) error {
+	defaultStorageId := ""
+	if root, _ := guest.GetSystemDisk(); root != nil {
+		defaultStorageId = root.StorageId
+	}
+	storages, err := guest.GetStorages()
+	if err != nil {
+		return errors.Wrapf(err, "GetStorages")
+	}
+	storageMap := map[string]string{}
+	for _, storage := range storages {
+		storageMap[storage.StorageType] = storage.Id
+		if len(defaultStorageId) == 0 {
+			defaultStorageId = storage.Id
+		}
+	}
 	for i := range newDisks {
 		newDisks[i].Format = "vmdk"
+		if len(newDisks[i].Storage) == 0 {
+			// 若不指定存储类型，默认和系统盘一致
+			if len(newDisks[i].Backend) == 0 {
+				newDisks[i].Storage = defaultStorageId
+			} else if storageId, ok := storageMap[newDisks[i].Backend]; ok { // 否则和已有磁盘存储保持一致
+				newDisks[i].Storage = storageId
+			}
+		}
 	}
 	return nil
 }
diff --git a/pkg/compute/models/guest_actions.go b/pkg/compute/models/guest_actions.go
index c5427ebecd..f5a6250eef 100644
--- a/pkg/compute/models/guest_actions.go
+++ b/pkg/compute/models/guest_actions.go
@@ -4023,51 +4023,18 @@ func (self *SGuest) PerformRenew(ctx context.Context, userCred mcclient.TokenCre
 	return nil, nil
 }
 
-func (self *SGuest) GetStorages() []*SStorage {
-	disks, _ := self.GetDisks()
-	storageMap := make(map[string]*SStorage)
-	for i := range disks {
-		storage, _ := disks[i].GetStorage()
-		if _, ok := storageMap[storage.GetId()]; !ok {
-			storageMap[storage.GetId()] = storage
-		}
+func (self *SGuest) GetStorages() ([]SStorage, error) {
+	q := StorageManager.Query().Distinct()
+	disks := DiskManager.Query().SubQuery()
+	guestdisks := GuestdiskManager.Query().Equals("guest_id", self.Id).SubQuery()
+	q = q.Join(disks, sqlchemy.Equals(disks.Field("storage_id"), q.Field("id")))
+	q = q.Join(guestdisks, sqlchemy.Equals(guestdisks.Field("disk_id"), disks.Field("id")))
+	ret := []SStorage{}
+	err := db.FetchModelObjects(StorageManager, q, &ret)
+	if err != nil {
+		return nil, err
 	}
-	ret := make([]*SStorage, 0, len(storageMap))
-	for _, s := range storageMap {
-		ret = append(ret, s)
-	}
-	return ret
-}
-
-func (self *SGuest) SyncCapacityUsedForStorage(ctx context.Context, storageIds []string) error {
-	if self.Hypervisor != api.HYPERVISOR_ESXI {
-		return nil
-	}
-	var storages []*SStorage
-	if len(storageIds) == 0 {
-		storages = self.GetStorages()
-	} else {
-		q := StorageManager.Query()
-		if len(storageIds) == 1 {
-			q = q.Equals("id", storageIds[0])
-		} else {
-			q = q.In("id", storageIds[0])
-		}
-		ss := make([]SStorage, 0, len(storageIds))
-		err := db.FetchModelObjects(StorageManager, q, &ss)
-		if err != nil {
-			return errors.Wrap(err, "FetchModelObjects")
-		}
-		storages = make([]*SStorage, len(ss))
-		for i := range ss {
-			storages[i] = &ss[i]
-		}
-	}
-	for _, s := range storages {
-		err := s.SyncCapacityUsed(ctx)
-		return errors.Wrapf(err, "unable to SyncCapacityUsed for storage %q", s.GetId())
-	}
-	return nil
+	return ret, nil
 }
 
 func (self *SGuest) startGuestRenewTask(ctx context.Context, userCred mcclient.TokenCredential, duration string, parentTaskId string) error {
diff --git a/pkg/compute/models/storages.go b/pkg/compute/models/storages.go
index b95cd19cb3..264c50e5d2 100644
--- a/pkg/compute/models/storages.go
+++ b/pkg/compute/models/storages.go
@@ -966,54 +966,6 @@ func (sm *SStorageManager) SyncCapacityUsedForEsxiStorage(ctx context.Context, u
 	}
 }
 
-func (sm *SStorageManager) SyncCapacityUsedForStorage(ctx context.Context, userCred mcclient.TokenCredential, isStart bool) {
-	cpSubQ := CloudproviderManager.Query("id").In("provider", CapacityUsedCloudStorageProvider).SubQuery()
-	sQ := sm.Query()
-	sQ = sQ.Join(cpSubQ, sqlchemy.Equals(sQ.Field("manager_id"), cpSubQ.Field("id")))
-	storages := make([]SStorage, 0, 5)
-	err := db.FetchModelObjects(sm, sQ, &storages)
-	if err != nil {
-		log.Errorf("unable to fetch storages with sql %q: %v", sQ.String(), err)
-	}
-	for i := range storages {
-		err := storages[i].SyncCapacityUsed(ctx)
-		if err != nil {
-			log.Errorf("unable to sync CapacityUsed for storage %q: %v", storages[i].Id, err)
-		}
-	}
-}
-
-func (s *SStorage) SyncCapacityUsed(ctx context.Context) error {
-	cp := s.GetCloudprovider()
-	if cp == nil {
-		return errors.Wrapf(errors.ErrNotFound, "no cloudprovider for storage %s", s.Id)
-	}
-	if !utils.IsInStringArray(cp.Provider, CapacityUsedCloudStorageProvider) {
-		return nil
-	}
-	icp, err := cp.GetProvider(ctx)
-	if err != nil {
-		return errors.Wrap(err, "GetProvider")
-	}
-	iregion, err := icp.GetOnPremiseIRegion()
-	if err != nil {
-		return errors.Wrap(err, "GetOnPremiseIRegion")
-	}
-	cloudStorage, err := iregion.GetIStorageById(s.ExternalId)
-	if err != nil {
-		return errors.Wrap(err, "GetIStorageById")
-	}
-	capacityUsed := cloudStorage.GetCapacityUsedMB()
-	if s.ActualCapacityUsed == capacityUsed {
-		return nil
-	}
-	_, err = db.UpdateWithLock(ctx, s, func() error {
-		s.ActualCapacityUsed = capacityUsed
-		return nil
-	})
-	return err
-}
-
 func (self *SStorage) syncWithCloudStorage(ctx context.Context, userCred mcclient.TokenCredential, extStorage cloudprovider.ICloudStorage, provider *SCloudprovider) error {
 	diff, err := db.UpdateWithLock(ctx, self, func() error {
 		// self.Name = extStorage.GetName()
diff --git a/pkg/compute/tasks/guest_create_task.go b/pkg/compute/tasks/guest_create_task.go
index 755d5453f2..cdd546f575 100644
--- a/pkg/compute/tasks/guest_create_task.go
+++ b/pkg/compute/tasks/guest_create_task.go
@@ -170,11 +170,6 @@ func (self *GuestCreateTask) StartDeployGuest(ctx context.Context, guest *models
 
 func (self *GuestCreateTask) OnDeployGuestDescComplete(ctx context.Context, obj db.IStandaloneModel, data jsonutils.JSONObject) {
 	guest := obj.(*models.SGuest)
-	// sync capacityUsed for storage
-	// err := guest.SyncCapacityUsedForStorage(ctx, nil)
-	// if err != nil {
-	// 	log.Errorf("unable to SyncCapacityUsedForStorage: %v", err)
-	// }
 
 	// bind eip
 	{
diff --git a/pkg/compute/tasks/guest_delete_task.go b/pkg/compute/tasks/guest_delete_task.go
index 8a73cba5a3..765d269b0d 100644
--- a/pkg/compute/tasks/guest_delete_task.go
+++ b/pkg/compute/tasks/guest_delete_task.go
@@ -280,7 +280,7 @@ func (self *GuestDeleteTask) OnPendingDeleteCompleteFailed(ctx context.Context,
 func (self *GuestDeleteTask) StartDeleteGuest(ctx context.Context, guest *models.SGuest) {
 	// Temporary storageids to sync capacityUsed after delete
 	{
-		storages := guest.GetStorages()
+		storages, _ := guest.GetStorages()
 		storageIds := make([]string, len(storages))
 		for i := range storages {
 			storageIds[i] = storages[i].GetId()
@@ -345,18 +345,6 @@ func (self *GuestDeleteTask) OnGuestDeleteComplete(ctx context.Context, obj db.I
 	guest.EjectAllVfd(self.UserCred)
 	guest.DeleteEip(ctx, self.UserCred)
 	guest.GetDriver().OnDeleteGuestFinalCleanup(ctx, guest, self.UserCred)
-	// sync capacity used for storage
-	// ja, err := self.Params.GetArray(STORAGEIDS)
-	// if err == nil {
-	// 	storageIds := make([]string, len(ja))
-	// 	for i := range ja {
-	// 		storageIds[i], _ = ja[i].GetString()
-	// 	}
-	// 	err = guest.SyncCapacityUsedForStorage(ctx, storageIds)
-	// 	if err != nil {
-	// 		log.Errorf("unable to SyncCapacityUsedForStoarage: %v", err)
-	// 	}
-	// }
 	self.DeleteGuest(ctx, guest)
 }