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  • 60. Re: Seagate Momentus XT Disaster
    TechND Level 1 Level 1 (0 points)

    Glad to know this. However I installed a 240GB SSD about 2 months ago and have not experienced the performance problems that I was having with the Seagate Momentus. Maybe the Crucial SSD just works better with the 1.0 cable. I did a bench test today with Disk Speed Test on the SSD and came up with only about 1 GB/s read times. The overall performance is still faster than a mechanical drive, but I am going to find the 2.0 cable for my unit and see if it increases my read write times. $30 bucks would be well worth it even if it quadruples the performance. Thanks for the info.

  • 61. Re: Seagate Momentus XT Disaster
    TechND Level 1 Level 1 (0 points)

    Now I'm puzzled. My Macbook Pro is a mid-2009 Model A1286 (June 2009 - April 2012). This is the 2nd generation of the unibody Macs. It should have the newer cable. I wonder how I can verify this information without spending $30 to find out?

  • 62. Re: Seagate Momentus XT Disaster
    ArundelDesigns Level 1 Level 1 (0 points)

    This is a great and evolving thread, thanks everyone. I got a very good price from Amazon for the 500, and the reviews there for the 500 were much kinder than the 750. They also indicated it was a compatible replacement for the PlayStation 3 which is actually my impetus for getting a 2.5" drive. Still, I have plenty of external storage needs and am just as happy to try this out for my day-to-day working/scratch drive.

  • 63. Re: Seagate Momentus XT Disaster
    bresmi Level 1 Level 1 (0 points)

    That's the same model as mine (assuming it's a 13"). Not sure why or how Apple overlooked this detail, but definitely glad to have my computer up and running. I've had the new cable in for about a week now with no problems to report. Enjoying the Momentus as well. Noticeably quicker than the stock drive.

  • 64. Re: Seagate Momentus XT Disaster
    nathanphotographer Level 1 Level 1 (0 points)

    If you go inside "About this Mac", click on "More Info", then "System Report", then Serial-ATA, you will see your speed. Attached is the info from my 15"

    Late 2011 MBP with the 750 Momentus XT drive. You will see my link speed and negotiated link speed are both 6 Gigabit.

     

    My understanding is the 750 XT is MUCH faster than the 500GB version, and doesn't have all the problems.

     

    My 15" Late 2011 MBP 2.2 boots up from completely off in 31 seconds. Not sure what others are getting. I know before the drive it took close to double that.

     

     

    6GBcopy.jpg

  • 65. Re: Seagate Momentus XT Disaster
    tomfromchicago Level 1 Level 1 (0 points)

    How can you tell that this is a 2.0 cable?  Is there an easy way to differentiate this from a 1.0?

     

    bresmi wrote:

     

    Here's a link to the one that I purchased.

     

    http://www.ebay.com/itm/270993571227?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m143 9.l2649

     

    It ***** having to spend $30 more on a fix, but well worth it to have a working hybrid drive and upped transfer speeds.

     

    Let me know if it works!

     

    Best,

    Brett

  • 66. Re: Seagate Momentus XT Disaster
    bresmi Level 1 Level 1 (0 points)

    Not quite sure. I just know it works. One thing though is that I just checked the internal speed in my system report and it says that my drive is transferring at 3GB/s, which is half of what the drive is capable of I think, and from what I've read is half of what the board is capable of handling.

  • 67. Re: Seagate Momentus XT Disaster
    bresmi Level 1 Level 1 (0 points)

    I actually have the 750 XT, so the problems were seem to be present with that one as well, at least in my case.

  • 68. Re: Seagate Momentus XT Disaster
    Csound1 Level 8 Level 8 (35,365 points)

    bresmi wrote:

     

    Not quite sure. I just know it works. One thing though is that I just checked the internal speed in my system report and it says that my drive is transferring at 3GB/s, which is half of what the drive is capable of I think, and from what I've read is half of what the board is capable of handling.

    Your drive is capable of 0.12 to 0.25GB/s, nowhere near the interface capacity of 3GB/s. You would need to connect 15 to 30 of them at once to overrun the interface rate.

     

    http://techreport.com/review/22057/seagate-momentus-xt-750gb-hybrid-hard-drive/3

  • 69. Re: Seagate Momentus XT Disaster
    TechND Level 1 Level 1 (0 points)

    Except that the model cable you purchased is for an A1278 which is the Mid-2008 MacBook. Mine is a 1286 which is for the Mid-2009. This should have been past the initial cable snafu period. I suppose I will have to take the cable out, find the model number and see if I can identify the cables properties. My unit its a 15" MBPro.

     

    I'll be installing the Seagate Momentus in a Mid 2010 Mac Mini today or tomorrow and I'll be seeing how that goes.

  • 70. Re: Seagate Momentus XT Disaster
    TechND Level 1 Level 1 (0 points)

    According to the free application Mactracker, the A1278 13" Macbook has an internal transfer rate of 3.0gbps.

     

    Hard Drive Interface3.0 Gbps Serial ATA (SATA)
  • 71. Re: Seagate Momentus XT Disaster
    bresmi Level 1 Level 1 (0 points)

    Just double checked, the Seagate drive is capable of 6GB/s, but the link speed for the NVidia is what limits it.

     

    NVidia MCP79 AHCI:

     

      Vendor:          NVidia

      Product:          MCP79 AHCI

      Link Speed:          3 Gigabit

      Negotiated Link Speed:          3 Gigabit

      Description:          AHCI Version 1.20 Supported

  • 72. Re: Seagate Momentus XT Disaster
    Csound1 Level 8 Level 8 (35,365 points)

    bresmi wrote:

     

    Just double checked, the Seagate drive is capable of 6GB/s, but the link speed for the NVidia is what limits it.

     

    NVidia MCP79 AHCI:

     

      Vendor:          NVidia

      Product:          MCP79 AHCI

      Link Speed:          3 Gigabit

      Negotiated Link Speed:          3 Gigabit

      Description:          AHCI Version 1.20 Supported

     

    That is the interface speed, it is NOT the drive speed.

  • 73. Re: Seagate Momentus XT Disaster
    tomfromchicago Level 1 Level 1 (0 points)

    I am not following this at all.  Has a solution been technically identified?   Can someone please confirm?

  • 74. Re: Seagate Momentus XT Disaster
    bresmi Level 1 Level 1 (0 points)

    Yes. If you have the same model mac I do (13in MBP mid-2009), then getting a new cable, the one I lnked to previously, will fix it. It fixed it for me and it fixed it for other people who had the same problem. I got the information/solution confirmed from multiple threads.

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