Linux system does not normally shutdown solution __linux

The lab server uses Redhat as its operating system, but one of the biggest problems is that it does not shut down properly, or that the power supply does not shut down after the shutdown and requires manual shutdown. So we have been accustomed to shutting down the power button after the shutdown. Originally always thought that this is illegal shutdown, will damage the hard drive, yesterday only found that the power supply can not shut down, the others are closed, should not be damaged by the hard disk.

The method provided in the article "Poweroff cannot shut down the power supply" (that is, adding parameters Apm=off Acpi=on) did not solve the problem, and later found a similar approach to the/boot/grub/grub.conf
Add parameters to the file Apm=power_off Acpi=on, the final solution to this problem.

Paste: http://pheyoung.blogbus.com/logs/86551357.html