Step 4, in the Performing the Installation section of the DB2 Enterprise-Extended Edition for UNIX Quick Beginnings manual states that you should allocate a CD-ROM file system by entering the following command:
crfs -v cdrfs -p ro -d cd0
For this command to complete successfully, you must also specify the mount point using the --m command.
crfs -v cdrfs -p ro -d cd0 -m /cdrom
There is also a step missing in the Performing the Installation section. After Step 5, mounting the CD-ROM file system on the control workstation, each node that will participate in your partitioned database system should remotely mount the CD-ROM file system. Assuming that /cdrom does not already exist on participating nodes, use the following commands to export and remotely mount the /cdrom file system on the control workstation:
exportfs -i -o ro /cdrom
dsh mkdir /cdrom
dsh mount cws_hostname: /cdrom /cdrom
where cws_hostname is the host name of the control workstation.