当您第一次设置个人服务器或只是想升级或更新时，您可能想知道哪些硬件组件是必需的，哪些是不必要的。以机架为例，您的服务器一定要有机架吗？今天的超级用户问答帖子对一位好奇的读者的问题给出了一些有用的答案。

今天的问答环节是由SuperUser提供的，SuperUser是Stack Exchange的一个分支，是一个由社区驱动的问答网站分组。

图片由Tom Raftery（Flickr）提供。

问题

超级用户读者GoldieLocks想知道是否有必要安装一个机架来放置替换服务器：

I can get some decent deals on eBay for rack-mount servers (described as, for example, 2U rack-mount server) that I am looking at to replace my Synology NAS.

Would I be able to just buy this 2U server and sit it under my desk somewhere, or is it a requirement that you absolutely have to have a rack to put it in?

What does a rack give you that sitting on its own somewhere does not?

GoldieLocks真的需要机架来放置替换服务器吗？

答案

超级用户贡献者user1024和KlaymenDK为我们提供了答案。首先，用户1024：

You do not necessarily need a rack or cabinet, but here are some points to keep in mind though:

• If you keep it under your desk, it will accumulate dust.
• The fans of such servers can be rather loud (putting it mildly)! You really do not want that near you all the time!
• The power c***umption might be much higher than that of a SOHO NAS box.
• Rack-mountable servers are 19 inches wide and might be twice that in length.
• If you get an old server with parallel SCSI (not SAS), you will not be able to easily put in SATA-HDDs for regular SOHO-NAS Systems.
• Upgrading parts might be more difficult since they use server hardware (RAM, CPU, HDD, etc.).

A rack has the advantage that you can mount more than 10 servers in a single rack easily, and if you have them on rails, still be able to access them (slide out, open up, swap parts etc.). Also, the issues of cable management, airflow management, and power distribution come to mind.

接着是KlaymenDK的回答：

If what you are looking for is a way to avoid buying an expensive rack, you might be able to make do with a (stack of) IKEA LACK tables.

This might be the most official site about it: The LackRack

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