Why are you sure that cEd6s0 is not the device? I would suspect that it is. The paths are 14.0 and 14.6. Card 14 is cE because 14 in hex is E. Then the disk number is either 0 or 6. But just do:
dd if=/dev/rdsk/cEdxs0 bs=1024 of=/dev/null
for each device and while it is running see which disk is being accessed by looking at the lights on the drive. As you hit each drive with this command, the lights should start blinking.