Able to mount /dvdrom on HP-UX withouth fstab entry

Working on HP-UX box, I am able to mount the /dvdrom using "mount /dvdrom" without any reference to this mountpoint in /etc/fstab. When the device is mounted, the following appears in /etc/mnttab:

/dev/dsk/c0t0d0 /dvdrom cdfs ro 0 0 1242402405

How does the system know how to mount this without being in the /etc/fstab?
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LenstersConnect With a Mentor Commented:
It appears that they are adding some "intelligence" to the mount command (like Linux has).  Basically a set of defaults that are used for certain types of devices.
Uncle_JAuthor Commented:
Thanks. Can you find any documentation to support that?
Sorry, I can't find anything at the moment.
Uncle_JAuthor Commented:
Unable to verify.. But was an answer.
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