diff --git a/pkg/compute/models/disks.go b/pkg/compute/models/disks.go
index 36717c6852..5bb6012956 100644
--- a/pkg/compute/models/disks.go
+++ b/pkg/compute/models/disks.go
@@ -1749,6 +1749,8 @@ func fillDiskConfigByImage(ctx context.Context, userCred mcclient.TokenCredentia
 		}
 		if strings.Contains(image.Properties["os_arch"], "aarch") {
 			diskConfig.OsArch = api.OS_ARCH_AARCH64
+		} else {
+			diskConfig.OsArch = image.Properties["os_arch"]
 		}
 	}
 	return nil
diff --git a/pkg/compute/models/guest_actions.go b/pkg/compute/models/guest_actions.go
index dbf46ffd7f..beedfb5322 100644
--- a/pkg/compute/models/guest_actions.go
+++ b/pkg/compute/models/guest_actions.go
@@ -1476,6 +1476,16 @@ func (self *SGuest) PerformRebuildRoot(ctx context.Context, userCred mcclient.To
 		if err != nil {
 			return nil, err
 		}
+
+		// compare os arch
+		if len(self.InstanceType) > 0 {
+			provider := GetDriver(self.Hypervisor).GetProvider()
+			sku, _ := ServerSkuManager.FetchSkuByNameAndProvider(self.InstanceType, provider, true)
+			if sku != nil && len(sku.CpuArch) > 0 && len(img.Properties["os_arch"]) > 0 && !strings.Contains(img.Properties["os_arch"], sku.CpuArch) {
+				return nil, httperrors.NewConflictError("root disk image(%s) and sku(%s) architecture mismatch", img.Properties["os_arch"], sku.CpuArch)
+			}
+		}
+
 		diskCat := self.CategorizeDisks()
 		if img.MinDiskMB == 0 || img.Status != imageapi.IMAGE_STATUS_ACTIVE {
 			return nil, httperrors.NewInputParameterError("invlid image")
diff --git a/pkg/compute/models/guests.go b/pkg/compute/models/guests.go
index 8e7358ff6c..aa55f59564 100644
--- a/pkg/compute/models/guests.go
+++ b/pkg/compute/models/guests.go
@@ -1323,7 +1323,7 @@ func (manager *SGuestManager) validateCreateData(
 		input.Disks[0] = rootDiskConfig
 		if sku != nil {
 			if len(rootDiskConfig.OsArch) > 0 && len(sku.CpuArch) > 0 {
-				if strings.Contains(rootDiskConfig.OsArch, sku.CpuArch) {
+				if !strings.Contains(rootDiskConfig.OsArch, sku.CpuArch) {
 					return nil, httperrors.NewConflictError("root disk image(%s) and sku(%s) architecture mismatch", rootDiskConfig.OsArch, sku.CpuArch)
 				}
 			}
diff --git a/pkg/multicloud/aws/image.go b/pkg/multicloud/aws/image.go
index 161a5c9bf4..710116137d 100644
--- a/pkg/multicloud/aws/image.go
+++ b/pkg/multicloud/aws/image.go
@@ -99,6 +99,8 @@ type SImage struct {
 	// Usage                string
 	RootDevice     RootDevice
 	RootDeviceName string
+	// devices
+	BlockDevicesNames []string
 
 	Public             bool
 	Hypervisor         string
@@ -512,12 +514,15 @@ func (self *SRegion) getImages(status ImageStatusType, owners []TImageOwnerType,
 		}
 
 		var rootDevice RootDevice
+		devicesName := []string{}
 		for _, block := range image.BlockDeviceMappings {
 			if len(*image.RootDeviceName) > 0 && *block.DeviceName == *image.RootDeviceName {
 				rootDevice.SnapshotId = *block.Ebs.SnapshotId
 				rootDevice.Category = *block.Ebs.VolumeType
 				rootDevice.Size = int(*block.Ebs.VolumeSize)
 			}
+
+			devicesName = append(devicesName, *block.DeviceName)
 		}
 
 		osType := ""
@@ -547,6 +552,7 @@ func (self *SRegion) getImages(status ImageStatusType, owners []TImageOwnerType,
 			EnaSupport:         *image.EnaSupport,
 			Platform:           *image.Platform,
 			RootDeviceName:     *image.RootDeviceName,
+			BlockDevicesNames:  devicesName,
 			Status:             ImageStatusType(*image.State),
 			CreationTime:       createTime,
 			SizeGB:             size,
diff --git a/pkg/multicloud/aws/instance.go b/pkg/multicloud/aws/instance.go
index 33d5476922..6c50dc7923 100644
--- a/pkg/multicloud/aws/instance.go
+++ b/pkg/multicloud/aws/instance.go
@@ -27,6 +27,7 @@ import (
 	"yunion.io/x/log"
 	"yunion.io/x/pkg/errors"
 	"yunion.io/x/pkg/util/osprofile"
+	"yunion.io/x/pkg/utils"
 
 	billing_api "yunion.io/x/onecloud/pkg/apis/billing"
 	api "yunion.io/x/onecloud/pkg/apis/compute"
@@ -65,6 +66,7 @@ type SInstance struct {
 	multicloud.SInstanceBase
 
 	host       *SHost
+	img        *SImage
 	RegionId   string
 	ZoneId     string
 	InstanceId string
@@ -582,7 +584,33 @@ func (self *SInstance) GetVNCInfo() (jsonutils.JSONObject, error) {
 	return nil, cloudprovider.ErrNotSupported
 }
 
+func (self *SInstance) GetImage() (*SImage, error) {
+	if self.img != nil {
+		return self.img, nil
+	}
+
+	img, err := self.host.zone.region.GetImage(self.ImageId)
+	if err != nil {
+		return nil, errors.Wrap(err, "GetImage")
+	}
+
+	self.img = img
+	return self.img, nil
+}
+
 func (self *SInstance) AttachDisk(ctx context.Context, diskId string) error {
+	img, err := self.GetImage()
+	if err != nil {
+		return errors.Wrap(err, "GetImage")
+	}
+
+	// mix in image block device names
+	for i := range img.BlockDevicesNames {
+		if !utils.IsInStringArray(img.BlockDevicesNames[i], self.DeviceNames) {
+			self.DeviceNames = append(self.DeviceNames, img.BlockDevicesNames[i])
+		}
+	}
+
 	name, err := NextDeviceName(self.DeviceNames)
 	if err != nil {
 		return err
@@ -803,6 +831,7 @@ func (self *SRegion) CreateInstance(name string, image *SImage, instanceType str
 	for i := range disks {
 		var ebs ec2.EbsBlockDevice
 		var deviceName string
+		var err error
 		disk := disks[i]
 
 		if i == 0 {
@@ -832,9 +861,11 @@ func (self *SRegion) CreateInstance(name string, image *SImage, instanceType str
 				VolumeSize:          &size,
 				VolumeType:          &disk.Category,
 			}
-			// todo: generator device name
-			// todo: 这里还需要测试预置硬盘的实例。deviceName是否会冲突。
-			deviceName = fmt.Sprintf("/dev/sd%s", string(98+i))
+
+			deviceName, err = NextDeviceName(image.BlockDevicesNames)
+			if err != nil {
+				return "", errors.Wrap(err, "NextDeviceName")
+			}
 		}
 
 		// io1类型的卷需要指定IOPS参数。这里根据aws网站的建议值进行设置