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Understanding Hard Drive Controllers
The two main types of hard drives are IDE and SCSI, and each type has its own controller. IDE is more common in PCs, and newer PCs usually have two IDE controllers rather than one. For each IDE controller, your system can have only two hard drives: a master and a slave. Therefore, a PC with two IDE controllers can have as many as four hard drives. You should know which hard drive is which. Also, if you have a Windows system you want to preserve, you should know on which hard drive it resides. The following list shows a normal con- figuration on a Windows system:The first controller’s master drive is named C.
The next hard drive, named D, is the slave drive on the first controller.
The next hard drive, E, is the master drive on the second controller.
The last hard drive, F, is the slave drive on the second controller.
Windows is normally located on your C drive, and data is on your other drives. This lettering scheme is one possibility; your hard drives may be set up differently and may include CD-ROMs as drives on your IDE controllers.Some high-end PCs have SCSI controllers on their motherboards or on separate SCSI controller boards, either in addition to or instead of the IDE controllers. Older SCSI controllers can have as many as 8 devices on them, numbered from 0 to 7, including the controller. Newer SCSI controllers (known as wide controllers) can have as many as 16 devices, including the controller itself.
If all you have is a SCSI hard drive, Drive 0 or Drive 1 is usually your C drive, and others follow in order.If you have a mixture of IDE and SCSI controllers, your C drive could be on any of them. The sections “Discovering Your Windows 9x or Windows Me Hardware” and “Discovering Your Windows NT, Windows 2000, or Windows XP Hardware,” later in this appendix, show how to identify how many hard drives you have, what type they are, and which controllers they’re attached to.WarningConsider putting Red Hat Linux on a separate hard drive, for a couple of reasons. First, you can now find 80GB hard drives for much less than $100 (U.S.). Second, the task of shrinking MS-DOS and Windows to be small enough to allow Red Hat Linux to reside in its full glory on an existing hard drive is difficult at best and impossible at worst. Also, although splitting the Red Hat Linux distribution across hard drives is possible, doing so makes updating the distribution difficult later.
