66 lines
1.4 KiB
Bash
66 lines
1.4 KiB
Bash
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#! /bin/sh
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# Copyright (c) 2005 SUSE LINUX Products GmbH, Nuernberg, Germany
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#
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# Author: Ladislav Slezak <lslezak@suse.cz>
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#
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# System script for enabling/disabling IDE DMA mode
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#
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# The script takes the first command line parameter and sets the configured DMA
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# mode up. If the device is not configured in DEVICES_FORCE_IDE_DMA variable DMA
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# status is not changed.
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#
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HDPARM=/sbin/hdparm
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test -x $HDPARM || exit 5
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# read values from sysconfig
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. /etc/sysconfig/ide
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if [ "$DEVICES_FORCE_IDE_DMA" = "" -o $1 = "" ] ; then
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exit 0;
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fi
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OLDIFS=$IFS
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for dev in $DEVICES_FORCE_IDE_DMA ; do
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# Get device and DMA mode
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MODE=""
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DEVICE=""
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OPTIONS=""
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FIRST=0
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# The setting e.g. "/dev/hda:69:-c1:-m16:-u1:-W1:-A1" should be
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# expanded as "hdparm -d 1 -X 69 -c1 -m16 -u1 -W1 -A1 /dev/hda"
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IFS=":"
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for d in $dev ; do
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case $((FIRST++)) in
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0) DEVICE=$d ;;
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1) MODE=$d ;;
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*) OPTIONS="$OPTIONS$d:"
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esac
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done
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unset d
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if [ "$DEVICE" == "$1" ] ; then
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echo "$DEVICE: setting up IDE DMA mode $MODE"
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# Set DMA mode by hdparm utility
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if [ -z "$MODE" ] ; then
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echo "Missing DMA mode for device $DEVICE"
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elif [ $MODE = "off" ] ; then
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$HDPARM -d 0 "$DEVICE"
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elif [ $MODE = "on" ] ; then
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$HDPARM -d 1 "$DEVICE"
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else
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$HDPARM -d 1 -X "$MODE" ${OPTIONS:+$OPTIONS} "$DEVICE"
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fi
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fi
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# Reset Internal Field Separator for the outer loop
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IFS=$OLDIFS
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done
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unset dev
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