OWC SSD compared to Samsung/Toshiba? TRIM support?

Discussion in 'MacBook Air' started by PDFierro, Jul 27, 2011.

  1. PDFierro macrumors 68040

    Joined:
    Sep 8, 2009
    #1
    Can anyone with an OWC SSD or knowledge of comment on its performance vs. the Samsung/Toshiba drives?

    Also, what am I losing with no TRIM support? I've tried researching on it to find out what exactly it does, but I can't seem to get a handle on it.
     
  2. KPOM macrumors G5

    Joined:
    Oct 23, 2010
    #2
    http://barefeats.com/mba11_03.html

    TRIM is a feature that lets the operating system know that space that was occupied by a deleted file is now "open" to accept new data. SSDs work a little differently from hard drives, so features like TRIM help prevent the drive from becoming cluttered with random data. Either way, if your coming from a Core 2 Duo, then any of the new models would be a significant upgrade.
     
  3. drewyboy macrumors 65816

    Joined:
    Jan 27, 2005
    #3
    All sandforce controller based ssd's have trim built in. Much better than os trim and os should never have to deal with trim.
     
  4. PDFierro thread starter macrumors 68040

    Joined:
    Sep 8, 2009
    #4
    Okay, thanks! It seems like I would be well-served by the OWC then.
     
  5. Rigby macrumors 601

    Joined:
    Aug 5, 2008
    Location:
    San Jose, CA
    #5
    TRIM allows the computer to notify the drive when data blocks don't contain valid data anymore and can thus be safely discarded. There is no way for the drive to determine this by itself, since it does not "understand" file systems like HFS+, FAT, or NTFS. So no, there is no SSD with "inbuilt TRIM".

    Modern drives use a process called background garbage collection to improve write performance. This is a complex process that essentially tries to constantly rearrange and consolidate blocks of data to keep memory pages free for future write operations. This largely avoids the deterioration of the write performance over time that many early SSDs suffered from. However, even drives with background garbage collection benefit from TRIM, because it prevents them from unnecessarily copying around stale data blocks and thus reduces the number of memory write cycles. This can prolong the life of the SSD. However, modern drives will still last at least several years under normal conditions.
     

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