EXTREMELY slow read speeds - Optibay HDD

Discussion in 'MacBook Pro' started by MathiasVH, Jul 28, 2012.

  1. MathiasVH macrumors regular

    Joined:
    Nov 7, 2009
    #1
    Hi there

    Lately I've experienced seriously slow read speeds with my Optibay HDD. We're talking no more than 5mb/s (it used to be around 80). Write speeds are as fantastic as ever. I find it very weird. I've tried everything I can think of: First disk utility, then Drive Genius and then various small things like disabling journaling (even though this should only affect write speeds). Nothing has helped. Is the drive failing or can it be something else?

    Best regards

    Mathias
     
  2. albert1028 macrumors 6502

    Joined:
    Jun 29, 2007
    #2
    I think it highly depends on which optibay you have, since there are a number of manufactuerers beyond the name brand OWC (macsales.com). I also know that the hard drive matters as well, some people were reporting that using SATA III drives in older systems that do not support SATA III indeeds makes the OPTIBAY drive run on SATA I. It could be a number reasons that you are getting those slow speeds.
     
  3. MathiasVH thread starter macrumors regular

    Joined:
    Nov 7, 2009
    #3
    I apologize, I think I was unclear.
    The drive used to have read speeds at 80mb/s, and this was in the same configuration as it is in now, sitting comfortably in the Optibay.
     
  4. MathiasVH thread starter macrumors regular

    Joined:
    Nov 7, 2009
  5. sofianito macrumors 65816

    sofianito

    Joined:
    Jan 14, 2011
    Location:
    Spain
    #5
    I am using on my late 2008 MBP (see sig) a Samsung 830 64GB as boot drive and moved the Seagate Momentus XT in a cheap optibay I bought from ebay. The speed does not depend on the optibay. The Samsung is a SATA III (6GB/s) while my MBP is SATA II (3GB/s).

    The R/W speed I am having on my HDD is a bit lower than what it used to be as the main boot drive. I didn't format the drive though because I still need to do some data migration:

    Samsung 830 (4GB stress):
    Read: 168.8 MB/s
    Write: 252.3 MB/s

    Seagate Momentus XT (4GB stress):
    Read: 59.4 MB/s
    Write: 59.1 MB/s
     
  6. MathiasVH thread starter macrumors regular

    Joined:
    Nov 7, 2009
    #6
    Well, thanks I guess, but I already knew that :)

    The question is quite simple: My HDD has very slow read speeds. It was fast before. What can I do? :)
     
  7. sofianito macrumors 65816

    sofianito

    Joined:
    Jan 14, 2011
    Location:
    Spain
    #7
    1) Connect the HDD back with the main sata connector and test again.
    2) Get another HDD and test it in the optibay sata.
     
  8. EthosX macrumors regular

    Joined:
    Jul 23, 2012
    #8
    Hi I have same thing
    it is due to cheap china product from ebay...
    that converter adapter from PATA to SATA what is inside hdd caddy is complete crap !
    it is SATA I but in reality it is like 1/10 of SATA I pathetic !
     
  9. sofianito macrumors 65816

    sofianito

    Joined:
    Jan 14, 2011
    Location:
    Spain
    #9
    The cheap optibay I bought from ebay has a SATA connector which is the same as the MBP unibody optical SATA connector. The cables and connectors are the same and are valid for SATA I, II, and III.
     
  10. EthosX macrumors regular

    Joined:
    Jul 23, 2012
    #10
    Rpp
    Can u post pic how that odd caddy looks like just to compare with mine..
    I have 500G toshiba 5400rpm attached in .. speed is 5MB when copying on that hdd
     
  11. MathiasVH thread starter macrumors regular

    Joined:
    Nov 7, 2009
    #11
    Guys. I appreciate your efforts, but..

    The HDD has always been in the Optibay, but it hasn't always been slow. My problem has nothing to do with connections.

    Can anyone tell me what (if anything) I can do about a HDD with slow reads?
     
  12. Beta Particle macrumors 6502a

    Joined:
    Jun 25, 2012
    #12
    How full is the disk? Have you tried defragmenting it? (requires a tool such as iDefrag)

    Don't believe what you may have heard, HFS+ does need defragmenting. Just last week I had to defrag one of the MacBooks here as it was running incredibly slow:

    [​IMG]

    It should just be a passthrough connector.
     
  13. arashb macrumors 6502

    Joined:
    May 3, 2009
    #13
    I'm guessing you already tried reformatting the hard drive? If so defragging won't do anything.

    Optibays don't do anything other than acting like an extender.

    What what what? PATA to SATA? PATA hasn't been used in years, or even closer to a decade.
     
  14. EthosX, Jul 30, 2012
    Last edited: Jul 30, 2012

    EthosX macrumors regular

    Joined:
    Jul 23, 2012
    #14
    I have macbook pro 2007 you know ..
    And EVEN early 2008 still has PATA..
     
  15. arashb macrumors 6502

    Joined:
    May 3, 2009
    #15
    Oh that makes a lot of sense. Then in your case, if you're using a converter then it could be the issue. But to the OP, his is a sata passthrough so no matter how cheap the case, I don't think it an issue for him.
     
  16. EthosX macrumors regular

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    Jul 23, 2012
    #16
    Yeah so dont say decades man :-D
    in his case he has SATA II he should try another drive..
     
  17. arashb macrumors 6502

    Joined:
    May 3, 2009
    #17
    Haha, I never said decades.. I said close to a decade :]. And half a decade rounds up to a decade :]
     
  18. The Tourer macrumors newbie

    Joined:
    Jul 31, 2012
    #18
    Ever since upgrading to Mountain Lion, this has happened to me too. It causes iTunes to lag horribly and stop in the middle of tracks because I've moved my 75 GB library to the HDD in the Optibay, and because I have also moved my Mail storage, that too is slowed considerably.

    Any ideas?

    Specs:
    Mid-2010 15" Unibody MacBook Pro, 2.66 GHz Core i7, 8GB RAM, nVidia GT330M
    SSD (HDD Bay) = Kingston HyperMAX 3K 120 GB w/ Mountain Lion
    HDD (Optibay) = Factory 500 GB 7200 HDD.
     

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