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Why does FlexHex report wrong physical drive size on Windows NT?

April 26, 2017drive flexhex NT physical report size Windows wrong

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Why does FlexHex report wrong physical drive size on Windows NT?

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Windows NT and 2000 assume any physical drive has 512 bytes per sector, 63 sectors per track, and 255 tracks per cylinder. If your drive has a different geometry or no geometry at all (like USB flash drives), Windows returns the closest value, so the error may be as large as 8 Mb. Windows XP introduced a new function that returns the true drive size in addition to the geometry parameters, so FlexHex reports the correct physical drive size on Windows XP/2003 and Vista.