> For the complete documentation index, see [llms.txt](https://dev2ero.gitbook.io/notes-cs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://dev2ero.gitbook.io/notes-cs/architecture-hardware/she-bei-yu-jie-kou/qi-ta-she-bei/zi-fu-she-bei-yu-kuai-she-bei.md).

# 字符设备与块设备

* A Character ('c') Device is one with which the Driver communicates by sending and receiving single characters (bytes, octets).
* A Block ('b') Device is one with which the Driver communicates by sending entire blocks of data.
* Examples for Character Devices: serial ports, parallel ports, sounds cards.
* Examples for Block Devices: hard disks, USB cameras, Disk-On-Key.
* For the user, the type of the Device (block or character) does not matter - you just care that this is a hard disk partition or a sound card.
* Driver programmers, however, do care.


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