I use a Seagate 500gb and I recently bought another one, exactly the same. In BIOS it detects the 2nd Seagate fine, and everything seems to be working.
When I went to My Computer, only my main (C:/) drive was showing up. So I went into Disk Management and saw Disk 0: main hard drive, etc. and Disk 1: Unallocated space.
I could not format or anything so I was trying random options hoping for the best. At first I turned the drive from a basic drive to a dynamic drive. Then I right clicked and hit 'offline' and the second hard drive would not show up in My Computer still, but now it wasn't in Disk Management either.
I played around a bit in the DOS menu of 'diskpart'. I got the drive back online, but the status of the drive in Disk Management is now: "Disk 1: Dynamic Errors". If I right click my ONLY options are Offline, Properties, Help.
In 'diskpart' I tried to run the command 'clean' and 'clean noerr' to try to bypass errors, but it said "The operation could not complete on a drive that is read only."
Now I don't know what to do. ALL I want is to be able to use my second hard drive. There's no information on it, so I don't care about saving anything. If I have to wipe the hard drive somehow as well as my main working hard drive, I don't care. As long as I can get them both working together. PLEASE HELP!
P.S. I use Windows 7 64bit.