Re: Running hdparm command at boot

There's not much to present, except this url:

http://www.linuxdevcenter.com/pub/a/linux/2000/06/29/hdparm.html

I just followed the advice on this site and got some good results.

Thanks for the info on the location of the rc.local file, Eric; I found it,
added the command and after a reboot it seems to be working. Not as great an
increase in performance as I found earlier, but it seems to vary quite a bit.
Here's my latest benchmarks:

[root@ip68-2-116-4 ~]# hdparm -Tt /dev/hdc

/dev/hdc:
Timing cached reads: 424 MB in 2.01 seconds = 211.08 MB/sec
Timing buffered disk reads: 42 MB in 3.01 seconds = 13.94 MB/sec
[root@ip68-2-116-4 ~]# hdparm -Tt /dev/hdc

/dev/hdc:
Timing cached reads: 416 MB in 2.00 seconds = 207.72 MB/sec
Timing buffered disk reads: 60 MB in 3.11 seconds = 19.27 MB/sec
[root@ip68-2-116-4 ~]# hdparm -Tt /dev/hdc

/dev/hdc:
Timing cached reads: 420 MB in 2.01 seconds = 209.09 MB/sec
Timing buffered disk reads: 64 MB in 3.07 seconds = 20.86 MB/sec

These three instances were run consecutively, so you can appreciate the
variance. I imagine it's due to a variety of processes running in the
background, I haven't exactly performed a 'clean' benchmark with minimal
processes running.

On Sunday 06 February 2005 04:02, Eric "Shubes" wrote:
> Steven wrote:
> > After some tweaking and benchmarking with hdparm I've accelerated my hd
> > from ~3.5mb/s to over 29mb/s. I'd like add the hdparm argument so that
> > it runs everytime I boot my system. Is the /etc/rc.d/init.d file the
> > correct place to add this command?
>
> That's some performance gain. Would you consider doing a presentation at
> a meeting talking about what you did? I'd certainly be interested.
>
> [Note, this is only for RH/FC distros]
> /etc/rc.d/init.d is a directory. If you want your command to become a
> 'service' that you can control using the 'service' command (e.g. service
> myservicename [start|stop|restart]), you can put a script for
> controlling it in this directory, and then use the service and chkconfig
> commands to control when (which runlevels) it's executed. Note, these
> scripts must contain certain standard comments (code disguised as
> comments) to work properly. see man chkconfig.
>
> If you have just a hdparm command you want issued whenever the system
> boots, you can simply add it to the /etc/rc.d/init.d/rc.local file.
> That's where customization for a specific machine would go. Note,
> rc.local is executed after all other init scripts.
> [/Note, this is only for RH/FC distros]
>
> > Also, many thanks to Craig White for helping me solve my Fedora C3
> > problems. After running 'yum update' all issues seem to be resolved and
> > FC3 is running great. You're the /, Craig!
>
> I'll second that sentiment.
>
> > -Steven
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