[root@localhost /root]# modprobe ppa
ppa: Version 2.07 (for Linux 2.2.x)
WARNING - no ppa compatible devices found.
  As of 31/Aug/1998 Iomega started shipping parallel
  port ZIP drives with a different interface which is
  supported by the imm (ZIP Plus) driver. If the
  cable is marked with "AutoDetect", this is what has
  happened.
scsi : 0 hosts.
/lib/modules/2.2.19/scsi/ppa.o: init_module: Device or resource busy
Hint: insmod errors can be caused by incorrect module parameters, including
invalid IO or IRQ parameters
/lib/modules/2.2.19/scsi/ppa.o: insmod /lib/modules/2.2.19/scsi/ppa.o failed
/lib/modules/2.2.19/scsi/ppa.o: insmod ppa failed


There are the following lines in my modules.conf

alias scsi_hostadapter ppa
alias parport_lowlevel parport_pc
options parport_pc io=0x378 irq=7