磁盘的基本概念

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Primary partition – a primary partition can be used to boot an Operating System. Your Windows OS is installed on a primary partition.

Extended partition – an extended partition is used to hold logical drives.

Logical drives – logical drives hold files unrelated to the Operating System – pretty much everything else on your computer – data, audio, video, etc.

A disk with a traditional partition table can only have up to four partitions. Extended and logical partitions are a way to get around this limitation.

Each disk can have up to four primary partitions or three primary partitions and an extended partition. If you need four partitions or less, you can just create them as primary partitions.