|Western Digital IDE hard drives usually have TWO ways they can be set to Master - Master, single, or similar, for when they are by themselves on a data cable, and Master, with Slave, or similar for when there is another drive on the same data cable set to Slave. That MUST be set right for the situation.|
OR - you can set a single drive on a data cable or both drives on the same data cable to Cable Select.
If you DO have an IDE optical drive on the same data cable, if the markings on the back of the drive for the three jumper positions are not obvious, use good lighting at the back of the drive - there are letters etched into the plastic above each pair of pins -e.g. MA for master, SL for slave, CS for cable select.
Some bioses will attempt to boot from an IDE hard drive first by default if one is connected; some will attempt to boot from a SATA hard drive first by default if one is connected.
If the setting changes when you install the WD drive properly, the bios will try to boot from the wrong hard drive
- if that hard drive does NOT have an operating system installed on it, you will get a No Operating System Found or similar error and the bios will NOT attempt to boot from anything else.
- if that hard drive DOES have an operating system installed on it, if the Windows installation on that hard drive was for when it was connected to a mboard that is more than a little different from this one, often the operating system will NOT load all the way.
If you find the bios is attempting to boot from the wrong hard drive after the Western Digital drive is detected, go into the bios Setup and either
- find the list of hard drives in the bios - it's often near the Boot order or similar settings - the model of the drive you want to boot from must be listed first, Save bios settings.
- less commonly, there may be no hard drives list, but there is more than one hard drive listed in the Boot Order or similar list - the drive you want to boot from must be listed first, Save bios settings.If models are not listed, then they're listed generically, in the order the bios is detecting them according to which connections they're connected to - e.g. HDD0, HDD1, etc.