[ltp] How does /proc/acpi/ibm/bay work

[Theodore Ts'o]

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On Thu, Mar 31, 2005 at 07:39:59AM +0200, Tino Keitel wrote:
> > Does anyone use /proc/acpi/ibm/bay and can write about his/her
> > experiences, especially what does work and what doesn't?
> 
> Hum, is there really nobody out there who uses UltraBay hotswapping?

I can swap my DVD/CD-RW drive, as well as an additional IDE hard
drive.  In fact, I regularly use the hot-swap feature so that I can
disable the ultrabay when I am not using the disk, and when I am
suspending the laptop for additional power savings.

This is on a T40, using the the following scripts.  The idectl script
is from the hdparm sources, in the contrib directory.

					- Ted

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#!/bin/bash=0A=0A/bin/sync=0A/usr/local/sbin/idectl 1 off=0A=0A/bin/echo ej=
ect > /proc/acpi/ibm/bay=0A
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#!/bin/sh

HDPARM=/sbin/hdparm
MAX_IDE_NR=1

IDE_IO_0=0x1f0
IDE_IO_1=0x170

USE_IDE_DEV_0=/dev/hdc
USE_IDE_DEV_1=/dev/hda

usage () {
	if [ $# -gt 0 ]; then
		echo $* >&2
		echo
	fi

	echo "usage: $0 ide-channel-nr [off|on|rescan]" 2>&1
	exit 1
}

IDE_NR=$1
MODE=$2

do_register=0
do_unregister=0


if [ ! "$IDE_NR" ] || [ $IDE_NR -lt 0 ] || [ $IDE_NR -gt $MAX_IDE_NR ]; then
	usage "Unrecognized IDE-channel number"
fi

case "$MODE" in
on )		do_register=1 ;;
off )		do_unregister=1 ;;
rescan )	do_unregister=1; do_register=1 ;;
* )			usage "Unrecognized command" ;;
esac

eval "IDE_IO=\$IDE_IO_$IDE_NR"
eval "USE_IDE_DEV=\$USE_IDE_DEV_$IDE_NR"

[ $do_unregister -eq 1 ] && eval "$HDPARM -U $IDE_NR $USE_IDE_DEV > /dev/null"
[ $do_register -eq 1 ] && eval "$HDPARM -R $IDE_IO 0 0 $USE_IDE_DEV > /dev/null"


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