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Current CD E100 limitations in the
DVD support for Apple environments
From SW version 5.10 Axis introduced support for Macintosh in the StorPoint E100 the support was later improved with additional
security features in 5.30
A Macintosh will be able to read and open files with the
following filesystems correctly from discs mounted in the StorPoint:
CD Formats
- ISO9660 with apple extensions
- Macintosh HFS
- Hybrid Discs with a combination of HFS & ISO9660
DVD Formats
- UDF with a ISO9660 header containing Apple extensions
The most common problems experienced related to the fact that Apple extensions is missing from the ISO 9660 header of the
DVD. The StorPoint and a Macintosh handles DVDs with ISO9660 headers
differently; A Macintosh mounts the UDF filesystem directly without taking notice of the ISO-header opposed to the StorPoint E100 which
mounts the disc with the help of a header, another difference is that the
MAC understands "Apple Extended Attributes" in the UDF
filesystem which the StorPoint doesn't recognize.
Examples of typical complications
- A DVD burned with Adaptec Toast for DVD with a ISO9660 works fine when shared on a MAC but not on the StorPoint:
The MAC can open files without problems - The creator program along
with misc. settings are identified by the Apple extended attributes
in the UDF system of the disc. It's not possible to open the same
files when the DVD is shared on a StorPoint E100, the reason for
this is that no apple extensions are available in the ISO-header
which the StorPoint has used to mount the disc - the client will
therefore be unable to identify which program that should be used to open the file(s).
A workaround for this limitation is to burn your DVD with the
proper Apple Extensions (note that in some cases reported from the field
the DVD has the flag for Apple extensions set in the header but no extensions exists.)
- A UDF DVD without ISO header works fine when shared on a MAC but
it's
impossible to open files when the same DVD is shared on a StorPoint:
The StorPoint will mount the UDF since no ISO header exists but
it is unable to recognize the Apple extended attributes of the UDF
that the MAC uses to open the files.
- A commercial DVD runs fine on a MAC but doesn't work with the
StorPoint:
The cause could be any of the above described the DVD could have
a combination of ISO/UDF or be a UDF only, either way it will be
impossible to use the DVD since it probably is lacking Apple
extensions in UDF.
Solution
A solution for the above described problems this is to implement support for "Apple extended
attributes" in the StorPoint code along with making it optional
which filesystem to mount. a time schedule for this has not currently been set. for now these problems are regarded as known
limitations.
Glossary:
ISO 9660 Format
The most common international standard for the logical format for
files and directories on a CD-ROM. Some other common logical formats such
as Joliet and Rock Ridge are extensions of ISO 9660.
HFS
The file system used by the Macintosh operating system to organize data on hard and floppy disks. Can also be used for CD-ROMs.
UDF
Universal Disc Format. A file system endorsed by OSTA (the Optical
Storage Technology Association) for use with packet writing and other
recordable optical disc technologies, such as DVD.
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