I am trying to format a brand new 1TB Western Digital blue mechanical hard drive using Windows 7 Disk Management. It is not giving me the option to select an allocation unit size less than 4096 bytes, but on the two other mechanical hard drives that I just formatted (500 GB and 750 GB), it gave me the option to select greater than or equal to 512 bytes. Is there something about the 1 TB size that prevents me from selecting less than 4096 bytes for allocation unit size?
Thank you.


