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Twin HDD's, need both to boot Win7, only 1(C: OS) showing in Explorer

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November 23, 2011 10:17:31 PM


I have two 500GB Hard Drives (SATA) installed on my Windows 7 PC. In Hardware Manager, both drives show up as installed and functioning properly. In Explorer, only one is showing. (The C:/ operating system drive) Both drives show up in BIOS if both are connected. If i disconnect either HDD, neither one shows up in BIOS. The PC will Only load Windows with Both HDD's connected. What is going on here? I am completely stuck on this one (I did not build this computer).
How can I gain access to this drive, wipe/format it, and make it both visible and accessible for use?

Motherboard= Gigabyte GA-EP43-UD3L
Logical Drives
--------------------------------------------------------------------------------
Drive Drive Type File System Total Size Used Space Free Space % Free Volume Serial
C: Local Disk NTFS 476936 MB 180308 MB 296628 MB 62 % 920B-E144
D: Optical Drive

Physical Drives
--------------------------------------------------------------------------------
[ Drive #1 - WDC WD5000AAKS-22TMA0 (WD-WCAPW3193017) ]
Partition Partition Type Drive Start Offset Partition Length
#1 NTFS C: 1 MB 476937 MB

[ Drive #2 - WDC WD5000AAKS-22TMA0 (WD-WCAPW3031751) ]
Partition Partition Type Drive Start Offset Partition Length
#1 (Active) NTFS 1 MB 476937 MB
a b G Storage
November 23, 2011 10:22:53 PM

click start -> type in "diskmgmt.msc" hit enter. See if there is unallocated space, and allocate it if there is.
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a b G Storage
November 23, 2011 10:27:52 PM

Start >> Right Click on Computer >> Manage >> Disk Management
Does your second disk appear here without a drive letter (like we normally have C: or D: or E: ). It should show as Disk 1 or Disk 2 or Disk 3 so on.
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a b G Storage
November 23, 2011 10:29:58 PM

I am sorry Supermuncher85 - when I started typing, your reply wasn't there... sorry about almost the same reply.
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a b G Storage
November 23, 2011 10:33:42 PM

No need to apologize :p  as long as his problem gets solved all is well.
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November 23, 2011 10:55:09 PM

Yes, it shows there as healthy, but without a drive letter. I clicked where the othwer drive shows C: and it highlighted a blank field.
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a b G Storage
November 23, 2011 11:00:13 PM

Right click on the one without a drive letter and go from there.
Assign a drive letter and reboot.
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November 23, 2011 11:04:26 PM

That worked great, didn't even need to reboot. Thank you so much, I really appreciate the help. You guys rock. :) 
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a b G Storage
November 23, 2011 11:05:33 PM

I am glad that helped and your problem is resolved!!!
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November 23, 2011 11:15:59 PM

Best answer selected by Zornes.
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