The last two times I've posted here were regarding some personal PC issues, but now this problem extends to a friend.
A friend and I just finished building a gaming PC for him. Part list is located here: http://pcpartpicker.com/p/L9TN99
A little background on this build...the BIOS on the motherboard was incompatible with his CPU, so we put the CPU from my rig into his, installed the OS onto the Samsung SSD, then updated the BIOS. When we put the 4790k back into his PC, it booted just fine (albeit for an SSD, it was very slow, which is a separate issue)...
To my knowledge, Windows 8.1 installed correctly. No errors in the installation process, no errors during the BIOS flash, it runs just fine (aside from the slow boot). The SSD is listed as the C drive and has all the capabilities of a normal hard drive. The entire OS is on there. I have the same Samsung running Windows 7, boots up in about 5-6 seconds. I also have the same Seagate HDD, and had no problems turning it into a single partition and formatting it (again, on Windows 7).
On his PC, the Seagate is recognized under the device manager, and it shows up in the disk management interface. It can't be used, of course, because it's not formatted. It also shows up in the sata ports in the BIOS. However, the Seagate HDD will not format through the disk management interface. The memory partition is healthy, and the capacity seems to be correct, but every attempt to format NTFS will simply error out with 'the drive cannot be formatted' or something. At first, after doing some troubleshooting, we checked the BIOS and only his SSD and optical drive were showing up in the ports. So I had him switch to a different sata port, and now it is showing up in the BIOS as well. However, it will still not format.
His BIOS time is around 10 seconds on start up, whereas mine on my laptop with no SSD is around 6. And it runs more start up processes with a slightly older CPU.
I've exhausted all my knowledge, and I'm beginnign to wonder if the drive is broken, or if the sata cable is bad. What else could be preventing a new HDD formatting? Is there a chance we screwed something up in the BIOS? All of our attempts to format the HDD were using the 'quick format' option. Later attempts were without this, but it would run for an absurdely long time with nothing apparently happening.
He's going to check out a PC repair place tomorrow, and hopefully get an HDD diagnostic.