On Sun, 27 Feb 2011, Kenneth Porter wrote:

To: CentOS mailing list centos@centos.org From: Kenneth Porter shiva@sewingwitch.com Subject: [CentOS] Standard location for hotplug-time hdparm invocation

I need to disable the spin-down on an external USB drive because it spins down spontaneously while in use. The drive forgets the spindown-disable state across power outage so I need to reissue the hdparm command with each boot or hotplug. Where should I put the hdparm command to do this?

Not sure about hotpluging, but for the reboot /etc/rc.d/rc.local might be a good place to try this:

#!/bin/sh # # This script will be executed *after* all the other init # scripts. You can put your own initialization stuff in here # if you don't want to do the full Sys V style init stuff.

touch /var/lock/subsys/local

# turn off DMA for hde WD drive # -d0 = off # -d1 = on # hdparm -d0 /dev/hde

# set sector count for multiple sector I/O # WD drives like a low setting # to prevent I/O data errors. # hdparm -m2 /dev/hde

Kind Regards,

Keith Roberts

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