HD Speed - 1TB in 24 iMac

Discussion in 'iMac' started by hukuma, Aug 15, 2008.

  1. hukuma macrumors newbie

    Joined:
    Jul 15, 2007
    Location:
    San Diego, CA
    #1
    Does anyone know if there's a difference between the drive speed of the 320GB and the 1TB drives in the iMac? I'm leaning towards the larger on-board drive...given that I have several TB of lossless music, video, etc. Obviously, I'll still need to run from some external drives, but I'd like to keep as much music as possible on-board.
     
  2. Cave Man macrumors 604

    Cave Man

    #2
    Probably won't matter since the iMac still has a lame-@$$ 1.5 gbps SATA controller.
     
  3. Leon Kowalski macrumors 6502a

    Leon Kowalski

    Joined:
    Sep 20, 2007
    Location:
    Gondwanaland Reunification Front HQ
    #3
    - All ALU iMacs have 3 Gbit/sec internal SATA interfaces.

    - Even the 1.5 Gbit/sec SATA in older iMacs is faster than the
    fastest/most modern high-capacity drives (i.e., 500 GB and up),
    and much faster than any USB or firewire external drive.

    To the OP: internal drive speed is a crap-shoot. There's no telling
    which make/model you'll get with a new iMac. It's a safe bet that
    it'll be something reasonably fast (in the 80 MByte/sec ballpark),
    but probably not the latest super-fast (> 100 Mbyte/sec) models.

    Also be aware that a modern drive's "maximum R/W transfer rate"
    applies only to the outer tracks. The speed drops by about 50% for
    the inner tracks -- so, any given drive is about twice as fast when
    nearly empty as when nearly full.

    LK
     
  4. hukuma thread starter macrumors newbie

    Joined:
    Jul 15, 2007
    Location:
    San Diego, CA
    #4
    Thank you

    OK...thank you for the information. Looks like there isn't a downside to taking on the 1TB drive!
     
  5. Phil A. Moderator

    Phil A.

    Staff Member

    Joined:
    Apr 2, 2006
    Location:
    Shropshire, UK
    #5
    Where did you get that information? According to System Profiler, my 24" iMac has the following in it

    To answer the OP's question, I have the 1TB drive in and it seems plenty fast - it's a Hitachi HDS721010KLA330, which is a 7,200RPM drive with 32MB cache, 8.5ms seek time and has a 300MB/S (3.0 Gigabit) interface
     
  6. Cave Man macrumors 604

    Cave Man

    #6
    Well, there you go. I thought the iMacs all still had ICH7 controllers... :eek:
     

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