Crucial C300 SSD TRIM supported in Lion w/TRIM enabler for SL

Discussion in 'Mac OS X Lion (10.7)' started by Davmeister, Jun 20, 2011.

  1. Davmeister macrumors 6502

    Davmeister

    Joined:
    May 7, 2009
    Location:
    London
    #1
    Just tried out the Dev preview of Lion (latest build) and TRIM is not natively enabled for the C300 SSD. On my SL partition if I use TRIM enabler, it doesn't really work...after a while TRIM seems to get turned off. However on Lion, it sticks for weeks, so I am making the assumption that TRIM will be either natively supported in Lion GM or permanently enabled with TRIM enabler as I have it now. The more you know.
     
  2. Davmeister thread starter macrumors 6502

    Davmeister

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    May 7, 2009
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    #2
    Screenshot here FYI
     

    Attached Files:

  3. fredsarran macrumors 6502

    fredsarran

    Joined:
    Jun 15, 2008
    #3
    Hi mate, is that a SSD in your Mac or external ? If external, which enclosure are you using ?
     
  4. Atarikid macrumors regular

    Joined:
    May 14, 2011
    #4
    Strange that the TRIM is disabled on your setup on regular basis.
    I run both Lion and SL with a Intel 320 SSD and TRIM enabler. Did it ones, and it always stays on.

    BTW I have bought a OWC SSD with a Sandforce controller. Those do not need TRIM at all.
     
  5. ScubaCinci macrumors 65816

    ScubaCinci

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    Jul 11, 2008
    Location:
    Cincinnati OH
    #5
    Every SSD needs TRIM over long term usage to maintain optimum performance. What makes you say it doesn't?
     
  6. FPSDavid macrumors regular

    FPSDavid

    Joined:
    Jun 23, 2010
    #6
    Garbage Collection, I'd guess? I don't know much on the subjects though...
     
  7. Atarikid macrumors regular

    Joined:
    May 14, 2011
    #7
    I had a long chat with someone of OWC. They did a lot of tests with Sandforce controllers and TRIM in the past. It seems using TRIM had a negative effect.
    The hardware 'trim-a-like' support in the Sandforce controllers should be much better and transparent compared to the software TRIM.

    For all other controllers, TRIM is a must though.
     
  8. Davmeister thread starter macrumors 6502

    Davmeister

    Joined:
    May 7, 2009
    Location:
    London
    #8
    It is strange....enabled in SL disabled in L. Oh well. I'm gonna secure erase and start fresh with Lion anyway. Probably a sensible time to do it for anyone with an SSD that needs that kind of maintenance.
     
  9. Atarikid macrumors regular

    Joined:
    May 14, 2011
    #9
    A ATA secure erase (not DU secure erase) is certainly a good start for a full clean OS install.
     
  10. Davmeister thread starter macrumors 6502

    Davmeister

    Joined:
    May 7, 2009
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    London
    #10
    I know this......but I don't know what utility to do it with for a crucial C300 SSD on a Mac. Ideas? Thanks.
     
  11. Atarikid macrumors regular

    Joined:
    May 14, 2011
    #11
    As far as I know you can only do this on a PC.
    But I read somewhere you can use a Linux boot cd to do the same. But many have issues with this.

    So, PC is the only secure way doing it.

    BTW correct me when I am wrong though. ;)
     

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