diff --git a/IRaCIS.Core.Application/Service/ImageAndDoc/SeriesService.cs b/IRaCIS.Core.Application/Service/ImageAndDoc/SeriesService.cs
index 7467fea44..4fe42154f 100644
--- a/IRaCIS.Core.Application/Service/ImageAndDoc/SeriesService.cs
+++ b/IRaCIS.Core.Application/Service/ImageAndDoc/SeriesService.cs
@@ -140,13 +140,40 @@ namespace IRaCIS.Core.Application.Services
 
             path = (await _instanceRepository.Where(s => s.SeriesId == seriesId).Select(t => t.Path).FirstOrDefaultAsync()).IfNullThrowException();
 
-            var physicalPath = FileStoreHelper.GetPhysicalFilePath(_hostEnvironment, path);
+            #region 切换磁盘存储之前
+            //var physicalPath = FileStoreHelper.GetPhysicalFilePath(_hostEnvironment, path);
 
-            //DicomInstance dicomInstance = await _instanceRepository.FirstOrDefaultAsync(s => s.SeriesId == seriesId).IfNullThrowException();
+            #endregion
+
+            #region 切换磁盘存储后
+
+            var physicalPath = string.Empty;
+
+            //找到所有磁盘
+            var drives = DriveInfo.GetDrives()
+                     .Where(d => d.DriveType == DriveType.Fixed && d.IsReady)
+                     //剩余空间最多的
+                     .OrderByDescending(d => d.AvailableFreeSpace)
+
+                     //存储空间相同，则按照按照总空间从大到小排序
+                     .ThenByDescending(d => d.TotalSize - d.TotalFreeSpace)
+                     .Select(d => d.RootDirectory.FullName)
+                     .ToList();
+
+
+            foreach (var drive in drives)
+            {
+                physicalPath = Path.Combine(drive, _hostEnvironment.EnvironmentName, path.Trim('/'));
+
+                if(File.Exists(physicalPath))
+                {
+                    break;
+                }
+            }
+
+            #endregion
 
-            //DicomStudy dicomStudy = await _studyRepository.FirstOrDefaultAsync(s => s.Id == dicomInstance.StudyId).IfNullThrowException();
 
-            //var (physicalPath, relativePath)  = FileStoreHelper.GetDicomInstanceFilePath(_hostEnvironment, dicomStudy.TrialId, dicomStudy.SiteId, dicomStudy.SubjectId, dicomStudy.SubjectVisitId, dicomStudy.Id, dicomInstance.Id);
 
             using (var sw = ImageHelper.RenderPreviewJpeg(physicalPath))
             {