Disk format support
From Applepedia
MacOS X comes with support for several disk formats. OS X keeps its filesystem support in /System/Library/Filesystems/. Macs only support booting from HFS, HFS+ and UFS disks (Note: You can't boot OS X from an HFS disk, only MacOS 9 or earlier. For OS X, use HFS+).
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Supported File systems
ISO 9660 (cd9660.fs)
Standard CD-ROM format (read-only)
CD Digital Audo (cddafs.fs)
Audio CD format (read-only)
HFS, and HFS + (hfs.fs)
Apple's Hierarchical File System, introduced in 1985. HFS+ is an extension to HFS to support more and larger files, and was introduced with MacOS 8.1. Also known as "MacOS Standard" and "MacOS Extended", respectively. Journaling is available in HFS+ by default in MacOS 10.3, and with a Terminal command in 10.2. (read and write)
FAT32 (msdos.fs)
Microsofts FAT File System, used by DOS and Windows 95/98/Me. Also supported by Windows NT/2000/XP, but has been superseded by NTFS. (read and write)
NTFS (ntfs.fs)
Microsofts NT File System, used by Windows NT/2000/XP. MacOS X only has NTFS read support, you can'r create or change files on an NTFS disk. To exchange files with a PC, use FAT32 instead. (read only)
UDF
Universal Disk Format, used by DVDs (read only)
UFS
Unix File System (read and write)
Other "file systems"
AppleShare (via appletalk)
Apples network filing protocol (read and write)
FTP (ftp.fs)
You can mount FTP servers as volumes. (read-only)
NFS (URLMounter)
Network File System (read and write)
SMB/Samba (URLMounter)
Windows-compatible file sharing (read and write)
Legacy file systems
MFS
Macintosh File System was the file system supported by the very first Macs. MFS didn't have real folders (they only worked in the Finder), and had other limitations which made it unsuitable for floppies larger than 400K - yet it already supported Resource forks, and 255 character file names. MFS write support was removed in OS 7.6, and MFS support was removed altogether in OS 8.
