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*.iso 和 *.img 的区别

 3 years ago
source link: https://blog.frytea.com/archives/627/
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*.iso 和 *.img 的区别

April 6, 2022 • Read: 78 • 编程开发

本文首发于: https://blog.frytea.com/archives/627/

最近经常接触各种系统镜像，大部分是 *.iso 格式（如 debian ），少部分是 *.img 格式（如 cirros），这两者究竟有何区别，最终在维基百科找到比较可靠的一段描述：

.IMG 这个文件格式可视为 .ISO 格式的一种 超集合 。

具体一点说就是：

由于 .ISO 只能封存使用 ISO9660 和 UDF 这两种文件系统的存储介质，意即 .ISO 只能拿来封存 CD 或 DVD，因此才发展出了 .IMG ，它是以 .ISO 格式为基础另外新增可封存使用其它文件系统的存储介质的能力， .IMG 可向后兼容于 .ISO 。如果是拿来封存 CD 或 DVD，则使用 .IMG 和 .ISO 这两种格式所产生出来的内容是一样的。

总结以下几点：

  • *.iso 是一种光盘的存档文件，被设计用于光盘存档，符合 ISO 9660 等光盘规范；
  • *.img 是一种文件归档格式，被设计用于数字存储、传输、以及整片 磁盘 / 光盘 内容的复制；
  • *.img 兼容 *.iso （*.iso 是 *.img 的特例）；

---------------------
Author: Frytea
Title: *.iso 和 *.img 的区别
Link: https://blog.frytea.com/archives/627/
Copyright: This work by TL-Song is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.


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