我的客户是一家医院，他们每天会产生大约50GB的PACS影像数据，pacs系统有个文件归档工具，该工具会把三个月之前的数据自动备份到一个文件服务器，但它只支持本地磁盘的文件归档操作，所以PACS服务器将文件服务器的共享存储通过磁盘映射的方式，映射为本地磁盘，比如W:。

这样，备份过程就是从本地磁盘D复制文件并粘贴到W，这个文件归档工具是另一家软件供应商提供的，它直接调用操作系统原生的复制、粘贴方法。 PACS服务器和文件服务器均为Windows Server 2016，该备份过程一直很顺利。但是问题来了，客户新增了一台Windows Server 2019作为文件服务器，然后备份过程就不太顺利了，总会有那么三五个文件失败，导致整个复制粘贴中断。报错内容如下：

我和客户检查了网络、磁盘权限、文件属性，一切都很正常。我尝试在Windows Server 2019搭建了ftp，并从PACS服务器上传这几个失败的文件，仍然不行。上传过程没有报错信息，只是提示“x个文件失败”。

我尝试使用远程桌面，连接到文件服务器，然后复制、粘贴这几个文件，成功了。这也说明，网络是没有问题的。

到底会是什么原因呢？是Windows Server 2019和Windows Server 2016在文件共享方面有什么差异吗？ TRANSLATION:

My client is a hospital and they generate about 50GB of PACS image data per day. The pacs system has a file archiving tool that automatically backs up data from three months ago to a file server, but it only supports file archiving operations on local disks, so the PACS server maps the file server's shared storage to local disks by means of disk mapping. for example, W:. In this way, the backup process copies files from local disk D and pastes them to W. This file archiving tool is provided by another software vendor, which directly invokes the copy and paste method native to the operating system. Both the PACS server and the file server are Windows Server 2016, and that backup process has been going smoothly. But the problem came when the customer added a new Windows Server 2019 as the file server, and then the backup process did not go so smoothly, there were always so many three or five files failing, causing the whole copy and paste to be interrupted. The error report reads as follows:

Network Error

A problem occurred while accessing W:\20220520

Please make sure you are connected to the network and retry.

My client and I checked the network, disk permissions, file properties and everything is fine. I tried to build ftp in Windows Server 2019 and upload these failed files from PACS server, still not working. There is no error message in the upload process, just "x files failed".

I tried to use remote desktop to connect to the file server, then copy and paste the files, and it worked. This also means that there is no problem with the network.

What exactly could be the cause? Is there some difference between Windows Server 2019 and Windows Server 2016 in terms of file sharing?