Fusion Drive NAND Sizes

Discussion in 'iMac' started by adamjackson, Mar 22, 2016.

  1. adamjackson macrumors 65816

    Joined:
    Jul 9, 2008
    #1
    via Wikipedia:

    [​IMG]

    -----

    I am upgrading from a late 2012 iMac 1TB Fusion Drive that appears to have had a 128GB NAND (TIL). I was going to buy a 3TB Fusion Drive and this certainly makes the decision easier that the 1TB actually had a NAND reduction from 128GB to 24GB 3 years later (WTF apple)?

    Either way, looks like the 3TB option has 128GB. Any way for me to add a new drive to my iMac w/ a larger NAND or is 128 the largest?
     
  2. Samuelsan2001 macrumors 603

    Joined:
    Oct 24, 2013
    #2
    Well they are separate drives so you could just get the HDD replaced with a 3tb, also I think that that model has a SATA connected SSD so you can put any SSD in you like.
     
  3. maflynn Moderator

    maflynn

    Staff Member

    Joined:
    May 3, 2009
    Location:
    Boston
    #3
    The Mac is sealed so its not an easy process, but check out ifixit.com and they have a guide and the tools to upgrade your mac. Personally, I'd not do it while its under warranty.

    As for the Fusion drive, its not a single unit, but two separate drives, that are "fused" together or to put it another way joined logically so they appear as a single unit. What makes this different then say a RAID configuration is that OS will decide what data blocks go on the faster flash ram, vs the slower hard drive.
     
  4. adamjackson thread starter macrumors 65816

    Joined:
    Jul 9, 2008
    #4
    ah, I honestly thought Apple was using drives like this -

    http://www.amazon.com/Seagate-Deskt...ybrid drive&qid=1458923747&ref_=sr_1_1&sr=8-1

    Seagate 2TB Desktop Gaming SSHD(Solid State Hybrid Drive

    Where it's an SSD inside of the HDD and reports to the disk manager as a single drive. I didn't know the 128GB NAND was on the logic board and OS X was looking at it as a single logical drive. Good to know.
     
  5. maflynn Moderator

    maflynn

    Staff Member

    Joined:
    May 3, 2009
    Location:
    Boston
    #5
    Initially I thought the same thing but those are hybrid drives.
     

Share This Page