CDFS, is a relatively simple format that was defined in 1988 as the
read-only formatting standard for CD-ROM media.
Windows 2000 implements ISO 9660-compliant CDFS in
WinntSystem32DriversCdfs.sys, with long filename support
defined by Level 2 of the ISO 9660 standard
Because of its simplicity, the CDFS format has a number of
restrictions
Directory and file names must be fewer than 32 characters long
Directory trees can be no more than eight levels deep
CDFS is considered a legacy format because the industry has
adopted the Universal Disk Format (UDF) as the standard for readonly
media