Trouble formatting a 3.0TB external hard disk

Discussion in 'Mac Accessories' started by DanielCalladine, Sep 30, 2012.

  1. DanielCalladine macrumors member

    Jul 19, 2008

    I'm trying to format a WD Caviar Green hard disk in a Sata caddy but I'm having trouble with disk utility.

    It seems to only want to format it as 850GB instead of 3TB.

    I've seen a few threads in other forums but they were all windows based and too technical for me.

    My caddy does support 3TB.

    Thanks for any help, regards, Daniel
  2. murphychris macrumors 6502a

    Mar 19, 2012
    Caddy? What caddy? What computer? What SATA card? In Terminal type:

    diskutil list
    reply back with the result, ideally with code tags (highlight text, click the # button in the toolbar).

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