Optimum strip size for various SSDs and OS

Discussion in 'Mac Pro' started by gugucom, Aug 13, 2009.

  1. gugucom macrumors 68020

    gugucom

    Joined:
    May 21, 2009
    Location:
    Munich, Germany
    #1
    I noticed that my Supertalent MEs were experiencing massive speed loss in tests when file size fell under 32k and set my strip size accordingly. If I remember right I went to 64k.

    When I cloned my OS X drive I got something like 30 MB/s average and initally it was down at 10. Later when I was copying Gigabyte files (Winclone images) it got up to 110 MB/s peak value.

    I have no simmillar info for my new Intels 2nd gen. So provisionally I'll be using a simillar value.

    I also noticed that Windows disk management program uses 4128k as a standard which appears massive and probably usefull for HDDs.

    Could somebody with more in depth knowledge advise a rational choice for OS x and Windows for different SSDs?
     
  2. nanofrog macrumors G4

    Joined:
    May 6, 2008
    #2
    Internally, SSD's are using 4KB pages, but to the system blocks are 512KB, or 128 pages per block.

    128 pages * 4KB = 512KB for the stripe yeilds the best results.

    I've also seen 512 used in an article or two.
     
  3. gugucom thread starter macrumors 68020

    gugucom

    Joined:
    May 21, 2009
    Location:
    Munich, Germany
    #3
    I guess thats true then for Windows as well. OS X will also have much smaller file sizes.
     

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