After a hard installation process, I finally put UnixWare 7.1.1 was installed on IBM XSeries 225, and the experience shared as follows: 1. Download LSI53C1030 for Unixware 7.x from http://www.lsilogic.com/downloads DD file, use Rawwritewin.exe to make HBA floppy disk by Rawwritewin.exe; 2. Since the CPU frequency exceeds 1G, the HBA disk cannot be read with the original boot disk, so you need to internet access to SCO (ftp://ftp.sco.com/ Pub) Download the latest boot, the file name is PTF7619D.Boot1.img, PTF7619d.boot2.img. Put the image directory on the CD, cover the original file with the downloaded file and make two boot floppy disks. The most specific directory is ftp://ftp.sco.com/pub/unixware7/ptf7619d/; 3. Camera to install the host, CMOS set the floppy disk start, and put the first floppy disk to the floppy drive to restart, according to the basis Tip Insert the second floppy disk; 4. The optical drive of the installation host is determined to be Master; 5. Select Zone for Americas, locale as C (English), keyboard type is United States, press