3.6.1 Volume name space and file name filter

The server maintains three different configurable names for each disk. These names are pc name, rr name and hs name. Each view has a volume name space, pc, rr, or hs. A pc view shows all its disks under their pc name. The same applies to the other volume name spaces. Thus, the same disk can have a long name for UNIX clients and a 8.3 name for PC clients. The server, when it detects a new disk, actually uses the complete disk name as the rr and hs name, and generates a pc name in 8.3 convention. A CD named betties_body appears as betties_body in rr and hs views, and as betties_.bod in pc views. The administrator can rename the disks at any time. The file name conversion for pc names can be disabled by setting the parameter fullvn to 1 (see "Server parameters" on page 125).
Different views may also filter file names in different ways. They may convert file names to upper case or lower case letters, or leave them as is. They may use the ISO name or the rock ridge name for ISO 9660 CDs, optionally omitting the version number required by ISO 9660. The administrator can define his or her own file name filters, and assign them to the views. However, the three default filters that are defined in the server will be sufficient for most purposes. For instance, a pc view will use the predefined pc filter, if the adminitrator does not define a separate file name filter. This is the most frequent case. The predefined filters are:

pc filter: This filter is optimized for PC clients. It is case-insensitive since all file names are converted to lower case by default. The NT configuration redefines the pc filter, so that all file names are converted to upper case. This is because most PC software expects upper case file names.
rr filter: This filter is optimized for UNIX clients who like to see ISO 9660 CDs with the optional Rock Ridge attributes. In particular the Rock Ridge attributes often contain file names, that are not subject to the rather restrictive ISO 9660 standard, but show a UNIX file tree exactly. If available, the rr filter pesents these UNIX oriented file names.
hs filter: This filter does not modify the file names at all. It presents them in the High Sierra or ISO 9660 format, even with the version number, which is silently removed by the other two filters. The filter is hardly useful for practical purposes, except that it shows the actual file names on the disks.
Using the GUI, the volume name space and file name filter can only be selected together with the "format" option. Using the CLI, the volume name space can be selected with "format", and the file name filter can be selected with "fnfilter" for each view.