Note: This article pertains to Mac OS X Server versions 1.x, which were released prior to May 2001. This issue is resolved in Mac OS X Server 10.0.3 or later.
Mac OS X Server will not boot if multiple copies are installed on a single hard disk. However, the installer will dutifully install multiple copies of Mac OS X Server if you tell it to do so. Unlike other Unix-style operating systems Mac OS X Server also only supports one UFS partition on a hard disk.