sr_mod for dvd drive to use ide-cd of old pata driver set-howto
 

Hai there,
I am using Ubuntu Feisty on one of the machine with 2.6.20-386 kernel on an intel HT 2.8Ghz machine.after installation the same problem of ide-pata dvdwriter detected as/or emulated as scsi by new libata drivers using module sr_mod and set device as /dev/sr0.
So,I modprobed ide-cd and blacklisted forcefully(yes using /etc/modprobe.d/00.local) and added ide-cd to /etc/modules file.but still the device /dev/scd0 or /dev/sr0 are made by udev.So Is there any way to make Ubuntu udev and other systems to make ide-cd as the module for cdrom
I know there is the kernel initrd image that too have something to do with sr_mod been used for my dvdwriter.but i need hdparm and to enable DMA,the old drivers.
Somebody can help me?Thanks all.

BUMP^_^ someone who experiment with priority of module loading please help me make ide-cd be used for my ata dvdwriter. :) please share the open source spirit! :)

Got some clues.while i had installed Ubuntu,my BIOS setting for harddisk was set to "auto".I changed it to "enhanced" means supporting all pata and sata ports.

Is the drive connected via SATA or ordinary parallel cable?

If it is connected with a SATA cable, then you have to use the SCSI emulation, because of the way the kernel addresses SATA drives.
Have you tried sdparm?

no i figured out that BIOS i have to select enhanced mode for pata support.so,still sr_mod is used.but i dont how to force use ide-cd.
yes.i have a ide dvdwriter connected with normal pata connector.
while my hdd is sata.so i dont want scsi_emulation.after changing the bios setting to enhanced mode,live-cd detects and uses ide-cd module.but the ubuntu hdd installed does not :?
sdparm-i have already tried and it automatically sets udma2 for the dvd drive.it is working OK.but still the old pata drivers which i want to use for dvdwriter.hence ide-cd.an lsmod |grep cdrom shows both modules are loaded :(

some help :s