Use the blockdev command of linux to invoke the block device control program

Editor to share with you the use of linux blockdev command to call block device control program, I believe that most people do not know much, so share this article for you to learn, I hope you will learn a lot after reading this article, let's go to learn the method!

The utility blockdev allows you to call the block device ioctl from the command line to take control of the device.

Syntax format: blockdev [parameters] [device]

Common parameters:

-Q quiet mode-v detail mode-setro read-only-setrw write-only-getro print read-only status, "1" for read-only, "0" for not read-only-getss print sector size. Usually flush the buffer for 521--flushbufs-- rereadpt reread the partition table

Reference example

Set the device to read-only:

[root@linuxcool] # blockdev-- setro / dev/hda4

Whether the reading device is read-only:

[root@linuxcool] # blockdev-- getro / dev/hda4

Set the setting to read / write:

[root@linuxcool ~] # blockdev-setrw / dev/hda4 above are all the contents of the block device control program called using linux's blockdev command, thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!