Hardware Reference
In-Depth Information
Due to backward-compatibility provisions, systems that don't support the Joliet exten-
sions (such as older DOS systems) should still be capable of reading the disc. However, it
will be interpreted as an ISO 9660 format using the short names instead.
Note
Abitoftrivia:“Chicago”wasthecodenameusedbyMicrosoftforWindows95.Jolietisthe
town outside of Chicago where Jake was locked up in the movie
The Blues Brothers
.
Universal Disk Format
UDF is a file system created by the Optical Storage Technology Association (OSTA) as
an industry-standard format for use on optical media, but it can also be used by other
types of removable-media drives, such as the Iomega REV drives. UDF has several ad-
vantages over the older ISO 9660 file system but is most noted because it is designed to
workwithpacketwriting,atechniqueforwritingsmallamountsofdatatoanopticaldisc,
treating it much like a standard magnetic drive. The UDF file system allows long file-
namesupto255characterspername.TherehavebeenseveralversionsofUDF,withmost
packet-writing software using UDF 1.5 or later. Packet-writing software such as Roxio's
DirectCD and Drag-to-Disc, Ahead Software's InCD, and Veritas and Sonic Solutions'
DLA use the UDF file system. However, standard optical drives, drivers, and OSs such as
DOScan'treadUDF-formatted discs. Recordable drives canreadthem, butregular optic-
al drives must conform to the MultiRead specification (see the section “
MultiRead Spe-
cifications
,
” earlier in this chapter) to be capable of reading UDF discs.
After you are sure that your drive can read UDF, you must check the OS. Most OSs can't
read UDF natively—the support has to be added via a driver. DOS can't read UDF at all;
however, with Windows 95 and later, UDF-formatted discs can be read by installing a
UDF driver. Typically, such a driver is included with the software that comes with most
CD-RW and rewritable DVD drives.
If you don't have a UDF reader, you can download one from the following websites:
• Get UDF Reader 2.5 for Windows XP from
http://www.videohelp.com/tools/
• Get UDF Volume Reader 7.1.0.95 for Windows 9x through XP from
ht-
• Get Nero AG Software's InCD Reader from the support section of
www.nero.com
.
AftertheUDFdriverisinstalled,youdonotneedtotakeanyspecialstepstoreadaUDF-
formatted disc. The driver will be in the background waiting for you to insert a UDF-
formatted disc.
