PROTOR Knowledge Base

PROTOR Redhat: Enabling IDE_SCSI module for Magneto-Optical drives

Author:	Don Davies
Date:	13-Jan-2003

Most PROTOR systems use magneto-optical disk drives as archive devices. These drives may have a true SCSI interface or an IDE interface and therefore require the ide-scsi module to be loaded.

This module may be manually loaded within one of the system startup scripts ( for example /etc/rc.d/rc.local ) with a line of the form:

         modprobe ide-scsi

Alternatively the system may be sent a command at boot time to enable this facility. For example if using the grub boot loaded then the following command may be added to the grub configuration file /boot/grub/grub.conf on loading the kernel.

         hdc=ide-scsi

In this example the magneto-optical drive would be set for master and connected to the secondary IDE controller ( hence /dev/hdc). If the drive were set for slave and connected to the primary IDE controller then the command would be

         hdb=ide-scsi

A suitable grub.conf file modified to contain this option would look like:

       default=0
       timeout=10
       splashimage=(hd0,0)/boot/grub/splash-prosig.xpm.gz
       title Red Hat Linux (2.4.7-10)
               root (hd0,0)
               kernel /boot/vmlinuz-2.4.7-10 ro root=/dev/hda1 hdc=ide-scsi
               initrd /boot/initrd-2.4.7-10.img

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