|The mboard bios must recognize the hard drive.|
If it doesn't Setup cannot find the hard drive.
If your mboard is older than about 2001 or so, it's bios may not recognize the drive as it's proper size, or may not recognize it at all, keeping in mind the binary size the bios and Windows sees is always smaller than the decimal size hard drive manufacturers use. .
If it is an IDE drive, the drive must be jumpered correctly.
You don't mix cable select jumpering with master / slave jumpering for two drives on the same data cable.
The blue connector on one end of the 80 wire data cable must plug into the mboard.
Some drive models e.g. some Western Digital ones - have two ways they can be jumpered as Master - single, when by itself on a data cable, and with slave present - when there is another drive jumpered as slave on the same data cable - such a drive must be jumpered the right way .
If it is a SATA drive,
- a SATA-II drive may not be detected on a mboard that does not have SATA-II support unless a jumper can be installed on pins on the drive to force it to be seen by the mboard bios as a SATA drive.
- it must be connected to a SATA header that a drive connected to that header can be booted from. If this is a generic desktop computer, see the mboard manual.
- depending on settings in your mboard bios, Setup may not see the drive at all. What you can do about that depends on whether you have a laptop or a desktop computer . If the SATA controllers in the bios are set to IDE compatible mode or similar, Setup will find the drive in any case, if nothing else is wrong.
If you need help regarding that, we need to tell us the make and model of your mboard, or the make and model of your brand name system.
If the drive already has one or more partitions on it that take up the entire drive space, you can't make another partition until you have deleted at least one partition. If you have a brand name system, see below - you don't normally delete any partitions in that case.
It is common to un-intentionally damage IDE data cables, especially while removing them - the 80 wire ones are more likely to be damaged. What usually happens is the cable is ripped at either edge and the wires there are either damaged or severed, often right at a connector or under it's cable clamp there, where it's hard to see - if a wire is severed but it's ends are touching, the connection is intermittant, rather than being reliable.
Another common thing is for the data cable to be separated from the connector contacts a bit after you have removed a cable - there should be no gap between the data cable and the connector - if there is press the cable against the connector to eliminate the gap.
80 wire data cables are also easily damaged at either edge if the cable is sharply creased at a fold in the cable.
Try another data cable if in doubt.
Check your SATA data cables. The connector on each end should "latch" into the socket on the drive and on the mboard, or on the drive controller card - it should not move when you merely brush your hand against it near the socket - if it does, mere vibration can cause a poor connection of it - use another SATA data cable that does "latch", or tape the connector in place.
(There is a slight projection or bump on one side of the outside of the connector that "latches" it into the socket - it's easily broken off or damaged)
If the hard drive is on a brand name system, and it already had the original software installtion on it, and you want to be able to re-install the original brand name software installation,
- if you delete the second smaller partition on the drive, or otherwise delete the data on it , you lose the ability to restore the original contents of the larger C partition with a single Recovery CD - you must use a Recovery CD set in that case to restore the original brand name software installation.
- DO NOT install Windows on the second partition when you have not deleted the contents of the first one that still has it's original brand name software installation - doing that will TRASH your original software installtion, you will have a dual boot situation, and neither copy of Windows will work properly, and the only way to recover from that is to use a Recovery CD set if want to recover the original brand name software installation.