Actually /etc/rc.d/rc.local is the file I used to run it out of when I needed to. The last few versions of Red Hat have not needed any tweaking on my systems. However, there actually is a file for this in Red Hat called /etc/sysconfig/harddisks which is a template for a configuration file. For instance, copy that file along with the name of the hard drive you want to tune like so:
# cp /etc/sysconfig/harddisks /etc/sysconfig/harddiskhda
and modify the new file to your liking. It already looks for this file in the rc.sysinit. At least RH 7.3 and 8.0 do, don't remember if 7.2 did. If you have a file called /etc/sysconfig/harddisks then it does.
[ December 21, 2002: Message edited by: void main ]