Choosing a File System

There’s one final decision you have to make: which file system you want to use for formatting your hard drive.

A file system is a scheme of formatting your hard drive, a system of dividing up its surface into little parking spaces for data. It’s a very technical issue, and, mercifully, one that’s largely invisible to you except for the day you install the operating system.

Windows XP offers a choice of two file systems, geekily named FAT 32 and . FAT 32 (file allocation table) is the descendant of the original DOS formatting scheme. NTFS (NT file system) is far more advanced and modern; it was introduced with Windows NT in 1993.

NTFS offers a long list of attractive features:

  • It can handle bigger hard drives than FAT—in fact, it can handle drives with capacities up to two terabytes (that’s 2,048 gigabytes). No, drives that big aren’t available today, but it’s only a matter of time. The FAT scheme can handle any of today’s hard drives, but Microsoft recommends that you use NTFS for all drives larger than 32 gigabytes.

  • It offers automatic file compression, conserving disk space.

  • It makes your hard drive much more immune to corruption (of the sort that used to require the old ScanDisk program to scurry around, cleaning up glitches).

  • It lets you take advantage of a long list of advanced hard drive and file features, including mounted drives (Chapter 15) and private folders that nobody else on the network can see (Chapter 17).

There’s only one significant drawback of formatting your drive with NTFS: older versions of Windows don’t recognize it. If you format your drive with NTFS when you install Windows XP, and then at some future time start up the computer using a DOS floppy disk, you won’t be able to “see” the NTFS drive.

Although Windows NT and 2000 do recognize NTFS disks, Windows 95, 98, and Me don’t. That’s a problem if you plan to dual boot between Windows XP and one of these older versions. The bottom line: If you intend to dual boot between Windows XP and Windows 95, 98, or Me, your startup drive must use the FAT file system.

If the lack of complete operating system support isn’t a problem, then you should opt for NTFS when installing Windows XP. Otherwise, use FAT.

Tip

If you are unsure about which file system to use, start out choosing FAT. You can never convert an NTFS drive to the older FAT system, but you can convert a FAT drive to NTFS at any time.

Here’s how. Choose StartAll ProgramsAccessoriesCommand Prompt. Type convert C: /FS:NTFS and then press Enter. (Of course, replace C: with whatever drive letter you’re trying to reformat.) If the drive you’re converting is the one with Windows XP on it, the conversion will occur the next time you restart the computer.

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