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I have a HP dV7t-7000 laptop with windows 8. I added a second HDD which gets detected in the BIOS, but not in windows 8. Both drives are 1TB in size.

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marked as duplicate by Ƭᴇcʜιᴇ007, Hennes, Michael Kjörling, Excellll, Dave M Aug 14 '13 at 13:27

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Does the HDD have a filesystem? What are you using to verify Windows can see the disk? If it has no filesystem there are other tools you can use to make it appears in My Computer. –  Ramhound Aug 13 '13 at 18:53

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If this is a brand new drive, it might have to be initialized in Disk Management.

In Windows 8, open Run from the Apps screen and type diskmgmt.msc and hit Enter.

You should see the hard drive in the bottom pane. Select it and click Initialize and format it as necessary.

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