I am trying to mount a DVD on QNX 4.25, the DVD drive is connected via SATA cable and the motherboard sees it as EIDE.  
Using 'show_pci - v' I found the hardware information and run the following commands:

# ls /dev
con1
...

# Fsys.atapi atapi irq=10,vid=0x8086,did=0x2920,pci=0 &
65 running Fsys.atapi
# Path=0 - Intel 82801HB SA
 target=0 lun=0 CD-ROM(5) - Optiarc DVD+-RW AD-7200S Rev: 101A

# ls /dev
cd0
con1
....

// Option 1

# Iso9660fsys -s -m &
72 running Iso9660fsys
# mount -t iso9660 /dev/cd0 /cd
Error mounting /cd (Resource temporarily unavailable)

// Option 2

# Iso9660fsys /cd=/dev/cd0 &
// Nothing happens

With Option 1 the DVD drive starts to spin then the error shows up.  What am I doing incorrectly?