HP-UX Reference (11i v1 00/12) - 4 File Formats (vol 8)

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STANDARD Printed by: Nora Chuang [nchuang] STANDARD
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c
cdrom(4) cdrom(4)
Level 2 No restrictions apply.
In all cases, receiving systems must fulfill the receiving system requirements specified in section 10 of the
ISO standard (no equivalent section exists for HSG).
Interchange levels provide a way to specify the data structure and complexity that exists on a CD-ROM.
The levels are:
Level 1 Each file consists of a single file section. File names contain no more than eight charac-
ters, and file name extensions contain no more than three. Directory names contain no
more than eight characters.
Level 2 Each file consists of a single file section.
Level 3 No restrictions apply.
DEPENDENCIES
HP-UX supports only the primary volume descriptor. When a volume is mounted, HP-UX mounts the
directory hierarchy described by the first primary volume descriptor it finds. Supplementary volume
descriptors are recognized and ignored, as are their associated directory hierarchies.
Directory hierarchies spanning multiple volumes are not supported.
Volume sets consisting of more than one volume are not supported.
Path tables are ignored in HP-UX. The normal path name lookup scheme used in HFS file systems is used
instead. This is done to allow other mountable file systems to be mounted on top of a mounted CDFS file
system. Also, since HP-UX maintains a cache of cdnodes for CDFS files (see cdnode(4)), the additional per-
formance gains provided by path tables are minimal.
HP-UX does not support multiple file sections. Each file must be recorded in a single file section.
HP-UX supports level 1 implementation and level 2 interchange.
NOTES
Additional CD-ROM formats are supported using PFS (Portable File System) utilities. See pfs(4) for more
details.
SEE ALSO
fsctl(2), stat(2), cdnode(4), pfs(4).
Information Processing - Volume and File Structure of CD-ROM for Information Interchange, Ref. No. ISO
9660: 1988 (E).
The Working Paper for Information Processing − Volume and File Structure of Compact Read Only Optical
Discs for Information Interchange, National Information Standards Organization [Z39].
Section 4−−36 − 4 − HP-UX Release 11i: December 2000
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