#!/bin/rc
# dmaon - turn on ide dma, if possible
rfork e
if(! test -f '#S/sdctl')
	exit ''
ctlrs=`{sed -n 's/(^sd.) ata .*/\1/p' <'#S/sdctl'}
if(~ $#ctlrs 0)
	exit ''
for(ctl in '#S/'$ctlrs^?/ctl)
	if (! grep -s '^config .* dma 00000000 ' $ctl)
		echo dma on >$ctl [2]>/dev/null || echo dmaon: $ctlr failed