older_balder
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Q: "No Entry" sign, disk repaired, but ...

Hello,

have a MacBook Air 1st Gen with Snow Leopard installed.

 

Have got the "no entry" sign, and have repaired the disk through disk utility.

however, if I verify the disk again, I get the same error "invalid content in journal" and I get the 'no entry' again.

 

what should I do? Would restoring from time machine solve the issue?

would lose the last week of data, though.

 

thanks!

MacBook Air

Posted on Dec 14, 2014 11:24 AM

by Grant Bennet-Alder,Solvedanswer
Grant Bennet-Alder Grant Bennet-Alder
Level 9 (61,083 points)
Desktops
A:

The article explains why TRIM is important.

 

TRIM Enabler will NEVER be in The Mac App Store, because it works by modifying Apple software. The developer also cannot charge money for the basic TRIM Enabler function, or Apple will sue him out of business.

 

TRIM Enabler works by undoing the intolerable decision Apple has taken is supporting TRIM ONLY for Apple branded devices. Since the code is in-line, the only solution a regular developer can make is to patch the Apple software. (Re-writing the entire module that code appears in from scratch without using any Apple code is mind-bogglingly complex, and out of the question.) Since Apple implemented that decision, they have discontinued selling add-on SSDs entirely, but have continued to not allow support for any third-party SSDs. So hobbyists have resorted to methods such as patching Apple software.

 

The developer of the TRIM Enabler package (free of pay-for-extra-features) is a Registered Developer, his Applications are signed, and he produces a high-quality product.

 

http://www.cindori.org/software/trimenabler/

Posted on Dec 17, 2014 5:52 PM

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older_balder

Q: "No Entry" sign, disk repaired, but ...

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  • by Grant Bennet-Alder,Solvedanswer

    Grant Bennet-Alder Grant Bennet-Alder Dec 17, 2014 5:52 PM in response to older_balder
    Level 9 (61,083 points)
    Desktops
    Dec 17, 2014 5:52 PM in response to older_balder

    The article explains why TRIM is important.

     

    TRIM Enabler will NEVER be in The Mac App Store, because it works by modifying Apple software. The developer also cannot charge money for the basic TRIM Enabler function, or Apple will sue him out of business.

     

    TRIM Enabler works by undoing the intolerable decision Apple has taken is supporting TRIM ONLY for Apple branded devices. Since the code is in-line, the only solution a regular developer can make is to patch the Apple software. (Re-writing the entire module that code appears in from scratch without using any Apple code is mind-bogglingly complex, and out of the question.) Since Apple implemented that decision, they have discontinued selling add-on SSDs entirely, but have continued to not allow support for any third-party SSDs. So hobbyists have resorted to methods such as patching Apple software.

     

    The developer of the TRIM Enabler package (free of pay-for-extra-features) is a Registered Developer, his Applications are signed, and he produces a high-quality product.

     

    http://www.cindori.org/software/trimenabler/

  • by older_balder,

    older_balder older_balder Jan 19, 2015 2:26 PM in response to Grant Bennet-Alder
    Level 1 (0 points)
    Jan 19, 2015 2:26 PM in response to Grant Bennet-Alder

    Look at this interesting trail I had with TRIM Enabler support - now I'm really confused!

    -- from myself --

    Have an old MacBook Air (first edition A1237).
    I have replaced the original SSD with the same model (only 120GB vs. 80GB) as suggested at an Apple Store, as my Mac is out of support. Had already a couple of ‘Gray screen + NoEntry sign’, which the Mac miraculously recovered from by itself the first time. This time I don’t know! I get the message that journal content is not valid.

    First time happened after a non-Apple SW update, this time after using Citrix.
    Would Trim a Enabler prevent this to happen again?
    Is it compatible with my settings: MacBook Air A1237, MacOSX 10.6.8 Snow Leopard, Samsung SSD.

    -- reply --

    Your problem sounds related to third party software. Trim Enabler will not help you in this case.

    -- from myself --
    Ok, thanks.

    Was told the problem could be that this SW wrote something where it shouldn’t have.
    And that Trim Enabler would help avoiding this issue.

    Was also told the issue is due to the use of non-Apple-branded SSD,
    and that Trim Enabler would somehow replace the ‘trimming’ that Apple-branded SSD have.

    Is this then not correct?
    Or I should get Trim Enabler once I restore the situation?

    -- reply --

     

    Sorry, no. Trim is not a protection for incorrect disk input/output. It is merely a means to achieve better performance.

  • by Grant Bennet-Alder,

    Grant Bennet-Alder Grant Bennet-Alder Jan 19, 2015 4:52 PM in response to older_balder
    Level 9 (61,083 points)
    Desktops
    Jan 19, 2015 4:52 PM in response to older_balder

    I get the message that journal content is not valid.

    That is a fairly serious disk data integrity problem. It may require a re-install. If you are lucky, a Disk Utility (Repair Disk) may fix it.

     

    This symptom is unrelated to TRIM Enabler in 10.6.8. The "No Entry" sign due to TRIM Enabler only comes into play in 10.9.5 and later.

     

    TRIM Enabler is only needed to maintain the speed of third-party SSDs -- Apple brand SSDs already use that function automatically.

  • by Grant Bennet-Alder,

    Grant Bennet-Alder Grant Bennet-Alder Jan 20, 2015 7:16 AM in response to older_balder
    Level 9 (61,083 points)
    Desktops
    Jan 20, 2015 7:16 AM in response to older_balder

    Have you recently run a long pass of Apple diagnostics?

     

    Unlike the Mac Pro, your MacBook Air does not feature error-correcting RAM Memory. A memory problem could explain these data integrity problems.

     

    Once the diagnostic is ready-to-run, press L to set looping mode and run all night.

  • by older_balder,

    older_balder older_balder Jan 20, 2015 2:05 PM in response to Grant Bennet-Alder
    Level 1 (0 points)
    Jan 20, 2015 2:05 PM in response to Grant Bennet-Alder

    Have reinstalled and recovered from Time Machine.

     

    Would you suggest to run AHT now?

  • by Grant Bennet-Alder,

    Grant Bennet-Alder Grant Bennet-Alder Jan 20, 2015 3:32 PM in response to older_balder
    Level 9 (61,083 points)
    Desktops
    Jan 20, 2015 3:32 PM in response to older_balder

    You have been having unusual drive problems (bad journal) that may be caused by memory problems, or maybe "just because".

     

    If you have an opportunity to run a long diagnostic (like overnight) it would make you feel better that there is not some fundamental flaw in your computer that is leading to this rare problem.

  • by older_balder,

    older_balder older_balder Jan 25, 2015 7:17 AM in response to Grant Bennet-Alder
    Level 1 (0 points)
    Jan 25, 2015 7:17 AM in response to Grant Bennet-Alder

    Ok, this is where I am.

     

    - have reformatted and reinstalled Snow Leopard

    - restored from Time Machine

    - everything seems working

     

    However, it looks like I can't run any HW test:

    - my MacBook is A1237, shipped originally with OSX 10.5.1

    - have no disks (it's a MacBook Air)

    - have upgraded to Snow Leopard (10.6.8)

    - if I hold the D key during start-up it ignores it, till at login I'm entering a password like 'DDDDDDDDDDDDDD' ;-)

    - if I try to restart from Snow Leopard installation disk I get the 'no entry' sign

     

    Is there a way I can run AHT?

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