tldr/pages.zh/osx/dd.md

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# dd
> 转换并复制文件.
- 从 isohybrid 文件(如 archlinux-xxx.iso制作可用于引导系统启动的 USB 驱动器.
`dd if={{文件.iso}} of=/dev/{{usb 设备}}`
- 将驱动器克隆到具有 4MB 块的另一个驱动器并忽略错误:
`dd if=/dev/{{源设备}} of=/dev/{{目标设备}} bs=4m conv=noerror`
- 使用内核随机驱动程序生成 100 个随机字节的文件:
`dd if=/dev/urandom of={{目标驱动器,接收随机数据文件名}} bs=100 count=1`
- 对磁盘的写入性能进行基准测试:
`dd if=/dev/zero of={{1GB 的文件名}} bs=1024 count=1000000`