hi, On Thu, Mar 28, 2002 at 01:57:58AM -0800, Bill Moseley wrote: > Hello, >
The magic works because cdrecord is actually looking for the /dev/sg* devices. You have one /dev/sg for each scsi device on your system, native SCSI or ide-scsi. And if you examine the configuration you'll see that this is the key of the whole thing. Try this: strace -e trace=file cdrecord -scanbus to convince your self. You could also try below sg ide-scsi sr_mod instead of the pre-install line. It's nicer because the modules are then automatically unloaded. You'll also not need the scd0 line anymore. Ionut > I assume this magic happens because of what I added to /etc/modutils/aliases > (and thus to modules.conf after running update-modules): > > options ide-cd ignore=hdd # tell the ide-cd module to ignore hdd > alias scd0 sr_mod # load sr_mod upon access of scd0 only > pre-install sg modprobe ide-scsi # load ide-scsi before sg > pre-install sr_mod modprobe ide-scsi # load ide-scsi before sr_mod > # I've got ide-cd compiled in now > #pre-install ide-scsi modprobe ide-cd # load ide-cd before ide-scsi > > I don't really see from man modules.conf why "alias scd0 sr_mod" makes that > happen on demand. It makes sense that a device request to /dev/scd0 might > trigger a kmod request. I guess I'm just missing something the modules.conf > man page. > > My ide-cd is compiled in > > bumby:~# fgrep IDECD /boot/config-2.4.17-k7t266 > CONFIG_BLK_DEV_IDECD=y > > So I'm disabling ide for /dev/hdd in lilo.conf > > bumby:~# fgrep hdd /etc/lilo.conf > append="apm=on apm=power-off hdd=ide-scsi" > > So the "options" line above doesn't seen necessary (as the pre-install I've > commented out). > > That's the setup. > > So I wonder: > > 1) cdrecord -scanbus only shows one ide-scsi drive (/dev/hdd -- my CD-R). > And also xcdroast only lists that one drive. Should I add hdc=ide-scsi to > lilo.conf and run both my CD/DVD (/dev/hdc) and my CD-R as ide-scsi? > > 2) if I did run both as ide-scsi, would that change the way I need to access > my CD/DVD drive? Currently I've got /dev/cdrom symlinked to /dev/hdc. Would > I then need to link it to /dev/scd0 so things like xmms still work? > > Currently, in xmms in input plugin CD Audio Player's setup shows: > > Device: /dev/cdrom > Directory: /cdrom > > If both /dev/hdc and /dev/hdd were ide-scsi would/could I say Device: > /dev/hdc instead? Or would /dev/hdc no longer work if it was ide-scsi? > > 3) If I setup both CD drives as ide-scsi, then I suppose I need another > "alias scd1 sr_mod" to auto-load modules on requests to that device, too. > True? > > 4) the modules setup still confuses me. I don't really understand the reason > for loading the modules on-demand instead of just loading them on boot or > compiled in. If I had ide-cd as a module, could I unload ide-scsi and end up > with just IDE CD drives again? And if so, what would be the reason for doing > so? With 1/2G RAM I'm not really worried about a few 100K of memory the > modules take up. > > 5) I suppose I need to set those on-demand modules as "autoclean" so they > will unload? > > 6) Back to question 4, I wonder if there's even reason to bother with this > on-demand loading and the settings in modules.conf these days (with so much > RAM). Should I just load the ide-scsi support in an init.d script? > > 7) Finally, where does modconf fit in with all this? Is it part of the > modules.conf setup, or just a front-end for selecting and loading modules. > Where does it store what is loaded? > > Thanks very much -- especially if you made it this far! > > -- > Bill Moseley > > > -- > To UNSUBSCRIBE, email to [EMAIL PROTECTED] > with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED] > -- *************** * Ionut Georgescu * http://www.physik.tu-cottbus.de/~george/ * Registered Linux User #244479 * * "In Windows you can do everything Microsoft wants you to do; in Unix you * can do anything the computer is able to do." -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
