首先，DAS（直连式存储）是一种将存储设备直接连接到服务器上的技术。这种技术简单易用，适合小型企业和对存储要求不高的场景。不过，DAS的扩展性较差，一旦服务器出现故障，存储数据也会受到影响，存在一定的安全隐患。

When shopping around for external storage, direct-attached storage (DAS) and network-attached storage (NAS) are often recommended over simple external drives. There are differences between the two ...

NAS enclosures are powered by an OS, offer network shares & can function independently. DAS setups lack an OS, connect directly to PCs via USB, and are more affordable than NAS. NAS can even help ...