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I have a Seagate Expansion 3TB external hard drive with data on it, and I wanted to get at the drive inside the enclosure and make it an internal drive. I'm using Windows 8, so the drive was being seen as having 4k sectors. When I connect via SATA, however, Windows reads the logical sector size as 512 bytes instead of 4096. In disk management it shows a protective GPT partition. When I put the HDD back into the enclosure, it shows it as having 4K sectors, and it reads all my data.

Why is this happening, and how can I get the drive to work when it's connected via SATA?

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    This is likely handled by the controller card within the enclouser.
    – Ramhound
    Commented Jun 13, 2013 at 1:02

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It turned out that this was handled by the controller in the enclosure, so I had to format the drive before I could use it elsewhere.

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