When the system is booted, SCSI devices are assigned device file names in a more or less dynamic way. This is no problem as long as the number or configuration of the devices does not change. However, if a new SCSI hard disk is added and the new hard disk is detected by the kernel before the old hard disk, the old disk will be assigned new names and the entries in the mount table /etc/fstab will no longer match.
To avoid this problem, use boot.scsidev. boot.scsidev handles the setup of the SCSI devices during the boot procedure and enters permanent device names under /dev/scsi/. These names can be used in /etc/fstab.
In the expert mode of the runlevel editor, activate boot.scsidev for level B. The links needed for generating the names during the boot procedure are then created in /etc/init.d/boot.d.