We have a Dell Dimension 8400 which had a SATA hard drive running XP home.
Decided to update to Windows 7 by adding a new additional SATA hard drive.
I disconnected the old hard drive first while doing the installation of the O/S.
All Ok untill I turned off and reconnected the original hard drive to another SATA port.
The system ( Windows 7) does not recognise the original hard drive, can't find it!
I then swapped the SATA cables then it booted into XP, same result, can't see the new drive.
I checked the BIOS and could not find anything to enable the other drive.
Although I did go through to Drives test within the BIOS and again could only see one drive.
It is always the one that is connected to the lower SATA port number.
I'm wondering if I should of left the old drive connected when installing Windows 7?
I selected Custom so I could point it to the drive I wanted but I just thought it would be safer to disconnect the original O/S and hard drive to isolate the data from being deleted accidentally.
Any ideas please!