How to determine whether a device is an optical drive or a hard disk

wyj1988629

In the Linux system, the device symbol of the optical drive can also be hda, hdb, etc. How can I tell in the code whether the hda is an optical drive or a hard disk? Thank you.

In addition, if the scsi device judges the devicetype field in the INQUIRYDATA data structure, if the value is 0, it is the hard disk?

xman099

you can use it
dmesg | grep CD
Can be found in the displayed line

萧水寒

You should find the information in the proc file.
/ proc / SCSI
/ proc / IDE
You can poll the files in these directories, there may be other related files, and now there is no system that can't help you to see them, you can research it yourself