CentOS - Feb 2011 - 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?

On Sun, 27 Feb 2011, Kenneth Porter wrote:
> To: CentOS mailing list <centos at centos.org>
> From: Kenneth Porter <shiva at 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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