diff --git a/dbm-services/common/db-resource/internal/model/TbRpDetail.go b/dbm-services/common/db-resource/internal/model/TbRpDetail.go
index c9e94d2973..f55361f2f5 100644
--- a/dbm-services/common/db-resource/internal/model/TbRpDetail.go
+++ b/dbm-services/common/db-resource/internal/model/TbRpDetail.go
@@ -155,16 +155,8 @@ func (t TbRpDetail) MatchDbmSpec(spec dbmapi.DbmSpec) bool {
 					return false
 				}
 			}
-			// 如果规格配置了上限
-			switch {
-			case diskSpec.MaxSize > 0:
-				if !isWithinRange(realDiskInfo.Size, diskSpec.MinSize, diskSpec.MaxSize) {
-					return false
-				}
-			case diskSpec.MaxSize <= 0 && diskSpec.MinSize > 0:
-				if realDiskInfo.Size < diskSpec.MinSize {
-					return false
-				}
+			if realDiskInfo.Size < diskSpec.Size {
+				return false
 			}
 		}
 	}
diff --git a/dbm-services/common/db-resource/internal/svr/dbmapi/dbm_spec.go b/dbm-services/common/db-resource/internal/svr/dbmapi/dbm_spec.go
index de239a6193..1880cb9a85 100644
--- a/dbm-services/common/db-resource/internal/svr/dbmapi/dbm_spec.go
+++ b/dbm-services/common/db-resource/internal/svr/dbmapi/dbm_spec.go
@@ -34,7 +34,13 @@ type DbmSpec struct {
 	DeviceClass     []string          `json:"device_class"`
 	Mem             meta.MeasureRange `json:"mem"`
 	Cpu             meta.MeasureRange `json:"cpu"`
-	StorageSpecs    []meta.DiskSpec   `json:"storage_spec"`
+	StorageSpecs    []RealDiskSpec    `json:"storage_spec"`
+}
+
+type RealDiskSpec struct {
+	DiskType   string `json:"type"`
+	Size       int    `json:"size"`
+	MountPoint string `json:"mount_point"`
 }
 
 // DbmSpecBaseResp dbm 规格信息