Practical Skills: Soft Switch and speed limit of optical drive in Linux

Article Title: Practical Skills: Soft Switch and speed limit of the optical drive in Linux. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source.

I. Soft Switch of the optical drive:

Eject-r cdrom: Open the warehouse door of the specified optical drive device. If there is only one optical drive, use eject directly. If there are two optical drive devices, specify the device according to the/dev/device file, for example, if there is a combo cdrom on my machine and the device file is/dev/cdrom1, run it with eject-r cdrom1.

The-t parameter is used to close the warehouse. For example, to close my COMBO, run the following command: eject-t-r cdrom1. and the advantage of eject is that the optical drive can be automatically attached to the file system, the file system is automatically detached when the pop-up occurs.

Ii. Speed Limit of the optical drive:

Eject-x n cdrom, n is the maximum speed. In actual use, n must be greater than or equal to 4, and there is no limit on the upper limit.

The eject also comes with a small software volname, which is used to read the name of the disc. Usage: volname/dev/cdrom. If your Linux does not have X-Windows, in TEXT mode, you can easily know the volume of the disc.

Tip: Question about the Chinese character file name. For example, if an eject is attached to an optical drive file system, the file names with Chinese characters on the optical drive will all be "?". After checking the source code of the eject, it is found that the setting in the/etc/fstab file is called to mount the file system, as long as iocharset = gb2312, codepage = 936 is added to the third column of the inverted number in the/dev/cdrom line. Re-use eject to mount the disc. You will find that the Chinese character file name is correctly displayed.