Note that there is another file system called FAT32 that pretty much does the same thing but with one major flaw. In other words, you can access the drive and transfer data without any hassles. What do I mean? If your disk was initially formatted to NTFS, the data on your drive can’t be read or written if you use the USB on a Mac computer.įortunately, there is a file system (actually two, I’ll explain later on) that you can format your flash drive to be fully compatible with Mac and PC. And you may want to start reading up on ZFS, Sun's revolutionary new file system that is supposed to come to the Mac with Leopard.If you have a USB drive, and you plan to use it on both a Mac and PC, things can get a bit tricky here. See the Filesystems HOWTO for much more information on many of these. UDF: the Universal Disk Format for DVDs.ISO-9660 (with various extensions): the file system for data CDs.NTFS: the Windows NT file system (read-only).In addition to the file systems listed above that you can use to format your drives with, Mac OS X has various levels of support for the following file systems: And don't format or partition an iPod using Disk Utility, because the iPod gets confused, even though it will function as an external drive. After this, newer files started overwriting older ones, but I didn't find out until a month later. I've lost a lot of data because the FAT file system on a FireWire drive got corrupt after I accidentally turned off the drive while it was in use. Use HFS+ with journaling if possible, especially on external drives. Don't use it unless you know you need to. UNIX File System (UFS) is exactly what the name suggests.Note that you can't have files of 4GB or bigger on a FAT volume. MS-DOS File System is the older FAT filesystem used with MS-DOS and Windows.Mac OS Extended (Case Sensitive, Journaled) is HFS+ with a combination of case sensitivity and journaling. Mac OS Extended (Journaled) is also HFS+, but it has an extra mechanism that avoids corruption of the file system when something bad happens, such as loss of power during a write operation.So the file text.txt is different from the file Text.txt and both can exist side by side. Mac OS Extended (Case Sensitive) is the same file system, but in this case, it treats file names that are the same but have different case as different.Mac OS Extended or HFS+ is an improved version of Apple's Hierarchical File System from the mid-1980s.Depending on the partition scheme, these are the file systems Mac OS 10.4 supports: This supports all the Mac-specific functions such as aliases and resource/data forks. In most cases, you'll want to use Mac OS Extended (Journaled) as the "volume format" (file system). You can put partitions with any of the supported file systems on a GUID disk, but only Macs running Mac OS 10.4 can access these disks. GUID Partition Table: this is how Intel Macs organize their boot disks.It looks like you can also use the Mac OS Extended (HFS+) file system on disks with a master boot record, but it's unlikely that older Mac OS versions support this. Master Boot Record: this is how MSDOS and Windows organize a disk, so use this if you have an external drive that you also want to use with a Windows machine. However, you can't put any FAT (MS-DOS/Windows-compatible) partitions on the disk. If you want to boot a PowerPC Mac from the disk, you need to use this partition scheme.
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