苹果 DOS 3.1 每个磁盘条使用13个扇区的数据。

Apple DOS 3.1 disks used 13 sectors of data per disk track.

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当这导致某些扇区或节点无效时，将最终丢失宝贵的数据。

When this makes some sectors or inodes invalid, you will end up losing valuable data.

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坏扇区降低硬盘性能，有时甚至使数据写入(如文件保存)困难，甚至是不能。

Bad sectors slow down hard disk performance and sometimes make data writing (such as file saving) difficult, or even impossible.

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