Can any of you help me why after allocating the disk slice to informix using onspace command the slice size becoming Zero and also if I check the partition table it is telling the disk has been formated.
I think that you must create especial device on /dev/rdsk/c1t5d0s3. Use mknod command next change owner.group = informix and chmod 660.
Next run onspaces.
I suggest that use symbolic links to raw-devices intead of raw directly.