Hard drive in the new iMacs?

Discussion in 'iMac' started by OldCorpse, Sep 18, 2007.

  1. OldCorpse macrumors 65816


    Dec 7, 2005
    compost heap
    Does anyone know offhand what the specs are on the hard drives in the new iMacs? Specifically, the RPMs and the cache size? Are these the same specs across all capacities, including f.ex. the 500GB ones? TIA!
  2. angrygolfer macrumors 6502

    Jun 25, 2007
    Well, not sure this helps but I know the 250GB and 320GB are both 7200rpm. My guess is the 500GB is either 7200 or 5400rpm.

    Just found that the 500GB is also 7200rpm
  3. AlexisV macrumors 68000


    Mar 12, 2007
    Manchester, UK
    7200 RPM, SATA and fast. :D

    They are decent drives.
  4. OldCorpse thread starter macrumors 65816


    Dec 7, 2005
    compost heap
    Thank you guys! Fantastic. Any idea if the cache is 16MB or 8MB? I'm asking about the specs, because I want to make sure I understand what they are selling, so I can make apples to apples (yes, pun, sorry) comparison:

    I noticed Apple wants $149 for the 500GB HDD option - which is odd, in that I can buy a 500GB SATA drive for around $100, and then I'd still have the 250/320GB one left as an external. I mean what's the deal here? The DIY route leaves me $50+250GB external drive richer than asking Apple for a 500GB BTO.
  5. emptyCup macrumors 65816


    Jan 5, 2005
    The deal is that you are not paying for labor and you are assuming the risk that if you break something it will not be covered by warranty. If you are comfortable with that you can save a lot of money.
  6. Umbongo macrumors 601


    Sep 14, 2006
    I've not seen anything to indicate that the drives that can have either 8mb or 16mb cache have 16. So the 320GB and 500GB likely still come with 8mb cache.

    In addition to what emptyCup said, these sort of add ons are where the vendors can make some serious money. Remember they are a business not your friend ;)
  7. Sirmausalot macrumors 6502a


    Sep 1, 2007
    there is another thread about DIY HDD in an iMac. Long and short, don't do it. Not worth the headache and especially the risk. Pay the few bucks extra for the biggest internal drive you can afford. The stock drive is probably fine in most cases anyway. If you have large video files, they should be on external.

    I went for the 750 because I have large Sound Effects Libraries and I want to have various DVD images on the internal drive. Still, I don't see myself getting near 750 anytime soon. Still, nothing will come close to the speed of an internal SATA drive -- so I was willing to spend a few extra bucks just in case I need the space down the line.
  8. OldCorpse thread starter macrumors 65816


    Dec 7, 2005
    compost heap
    Fair enough. I was looking for a music/film editing rig without spending as much as I'd have to do for a MP. The key variables for me are RAM and a fast HDD. I figured it would be cheaper if I can get an iMac and bump up the RAM on my own, and was hoping to do the same with the HDD, especially if I can put in something better specced than what Apple is likely to put in. However, if going DIY on the HDD is not a good idea, I'll resist (incidentally, I did change the HDD in my mini on my own without a problem, so that emboldened me).
  9. imacan macrumors regular

    Jan 14, 2007
    Montreal, Canada
  10. OldCorpse thread starter macrumors 65816


    Dec 7, 2005
    compost heap
    Ah, brilliant, imacan! Thank you for this. Of course, the maker of the HDD is also important. I'm glad it's not a Maxtor. I guess WD are OK, along with Seagate. I know they make 10K RMP, but I think in smaller capacities drives.
  11. mzd macrumors 6502a

    Jul 25, 2005
    i've got the seagate in mine - ST3500630AS

    Key Features and Benefits
    SATA 3Gb/s interface
    Perpendicular recording technology for maximum drive capacity and reliability
    16-MB cache buffer
    Ultra-fast performance
    Superb reliability
    Whisper-quiet operation
    Enhanced G-Force Protection against handling damage
    78 MB/s maximum sustained data transfer rate
    Clean Sweep calibration and Directed Offline scan diagnostics
    RoHS (restriction of hazardous substances) compliant
    5-year warranty
    Model Number ST3500630AS
    Interface SATA 3.0Gb/s
    Cache 16 MBytes
    Capacity 500 GB
    Guaranteed Sectors 976,773,168
    Spindle Speed 7,200 rpm
    Average latency 4.16 msec
    Random read seek time <8.5 msec
    Random write seek time <10.0 msec
  12. solvs macrumors 603


    Jun 25, 2002
    LaLaLand, CA
    Most of the 500GB ones are 16MB cache. Seagates and WD, but I've seen a Hitachi as well. The 320GB one that I last worked on was a WD, but it was 8MB cache.

    I do Mac support for a very large company BTW.
  13. expergo macrumors regular

    Nov 21, 2004
  14. vansouza macrumors 68000


    Mar 28, 2006
    West Plains, MO USA Earth
    1 Tera drive

    All iMac models include standard 3.5-inch Serial ATA hard drives that run at 7200 revolutions per minute (rpm). Your hard drive will come already formatted with the Mac OS Extended file format for efficient storage of your data.

    I got the above from the apple store. I ordered my iMac with the terabyte drive.

    My question.. is this one drive or two 500's? Does anyone know... thanks..
  15. yippy macrumors 68020


    Mar 14, 2004
    Chicago, IL
    Since there is only one spot to put a hard drive in the iMacs the 1Tb option is a single drive.
  16. Puckboy macrumors newbie


    Sep 16, 2007
    Vancouver, Canada
    Ordered a 500GB direct from Apple, and my system information shows this:

    ST3500630AS Q:

    Capacity: 465.76 GB
    Model: ST3500630AS Q
    Revision: 3.BTH


    As for doing the upgrade on your own, you'd have to look at the post from (Tom Sawyer, I believe) as Sirmausalot mentioned. I thought about it, and I know where you're coming from. As comfortable as I am with the innards of a PC, these all-in-one designs are a completely different matter. Decided the extra $100 was not a worth the risk compared to the potential damage I might have done if I were to open up the iMac myself.
  17. OldCorpse thread starter macrumors 65816


    Dec 7, 2005
    compost heap
    Thank you everybody for the fantastic replies, there's a ton of information here!

    I noticed that Seagate has the 1TB drives out there with a massive 32MB cache! Here's a link from newegg:


    The specs on this thing are insane! 3.0Gb/s - that's insanely fast. I don't know if Apple is selling the latest and greatest drives out there, but this drive is very good news. I mean, this is plenty for music/film work as your primary drive (of course you'll still need externals).

    Dear fellow mac users - THESE ARE GOOD TIMES! I wouldn't mind for the price of the 1TB drives to come down, but in time, I'm sure they will :)
  18. Vidd macrumors 6502a


    Mar 7, 2006
    How much of a difference does the cache size make?
    Is the 500GB upgrade worth it?
  19. OldCorpse thread starter macrumors 65816


    Dec 7, 2005
    compost heap
    IMHO it makes a great deal of sense to upgrade - do it BTO (unless you are comfortable DIY). Upgrading after the fact is a pain should you find you need more space (and I always find I need more space). You want your primary drive to be as large as possible, to futureproof your machine. And yes, the cache is important - the bigger the cache, the faster your drive, which is not only a factor in everyday use, but crucially important if you want to do any music or film editing.
  20. jch macrumors newbie

    Sep 21, 2007
    1 TB drive is a Hitachi

    This is what came with mine:

    Hitachi HDS721010KLA330:

    Capacity: 931.51 GB
    Model: Hitachi HDS721010KLA330
    Revision: GK0KA70M
    Serial Number: xxxxx
    Native Command Queuing: Yes
    Queue Depth: 32

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