You could go as far as to have a hard drive loaded up with your operating system of choice and set up for maintenance and troubleshooting situations and keep it in the spare caddy.
你可以将硬盘放置到备用的架子，然后使用一个硬盘去加载选择的操作系统，设置维护，排除故障。
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If you want to take a look at your boot drive in another computer or without the use of a live CD, you’ll need a caddy to whack it in.