If you have an IDE (ATAPI) DVD/CD-ROM but the installation program fails to find it and asks you what type of DVD/CD-ROM drive you have, try the following boot command. Restart the installation, and at the boot: prompt enter linux hdX=cdrom. Replace X with one of the following letters, depending on the interface the unit is connected to, and whether it is configured as master or slave (also known as primary and secondary):

If you have a third and/or fourth controller, continue assigning letters in alphabetical order, going from controller to controller, and master to slave.