Bug 62873

These lines from rc.sysinit cause the error:

[...]
# Turn off DMA on CD-ROMs. It more often than not causes problems.
if [ -e /proc/ide ]; then
  for N in `grep -v ide-disk /proc/ide/*/*/driver 2>/dev/null | awk -F / '{
print $5 }'`; do
   hdparm -d0 /dev/$N
  done
fi
[...]

First, rc.sysinit should check whether the device in question is ide-scsi and
depending on the result either do nothing or disable DMA differently (I don't
know if that can be done with hdparm, though). Second, hdparm should be quiet
("hdparm -q"):

[...]
# Turn off DMA on CD-ROMs. It more often than not causes problems.
if [ -e /proc/ide ]; then
  for N in `grep -v ide-disk /proc/ide/*/*/driver 2>/dev/null | awk -F / '{
print $5 }'`; do
   if [ -z "$(grep "$N=ide-scsi" /proc/cmdline)" ]; then
     #  no ide-scsi
     hdparm -q -d0 /dev/$N
   else
     # ide-scsi -- ignore or disable DMA differently
     [...]
   fi
  done
fi
[...]

Just noticed that rc.sysinit will ignore CDROMs/DVDs when evaluating
/etc/sysconfig/harddisk*. Very bad manners -- if I want wilfully to turn DMA on,
don't be standing in my way ;-). Watching DVDs just isn't possible with PIO (and
this is a 1.4GHz Athlon) and my DVD works very well with DMA, thank you. And
rc.local just isn't an option if there are hooks in rc.sysinit for it.

Maybe evaluate /etc/sysconfig/harddisk* for CDROMs/DVDs only when the user
waives all support right there? Maybe like this (/etc/sysconfig/harddiskhd*):

[...]
# DMA on CDROM or DVD causes many problems.
# Do not turn this on unless you know what you're doing. This configuration
# isn't supported!
#I_KNOW_WHAT_IM_DOING=1
[...]

The error messages should go away in initscripts-6.62-1.