Ratios below 1.0 with Transcend 4gb SDHC?

By Shrumster | January 3rd, 2009 | 3:02 am

I have a Fujitsu MHW2120BH (4 Partitions, 2 NTFS-vista, 1 ext3, 1 linux swap) on my rig right now, using EB 3.0 build 482 with a Transcend Class 6 4gb SDHC (all of it for EB). My speed reports are as follows:

Direct access speed: 11.199 MB/s

Cache enable access speed: 7.012 MB/s

Ratio: 0.626

Does this mean I’m actually running slower when using the EB cache?

8 Responses to “Ratios below 1.0 with Transcend 4gb SDHC?”

  1. Shrumster
    Jan 03, 2009

    With a (generic?) 1gb Micro Center SD, my results are:

    Direct access speed: 14.180677 MB/s

    Cache enable access speed: 8.248366 MB/s

    Ratio: 0.581662

    This disk is supposedly helluvalot slower than the other one. What gives?


  2. Shrumster
    Jan 03, 2009

    Ran it again with my Transcend:

    Direct access speed: 10.81 MB/s

    Cache enable access speed: 7.550 MB/s

    Ratio: 0.698


  3. Shrumster
    Jan 03, 2009

    Re-did the cache file on the Transcend. Now with a 1024mb cache file, NTFS default block size:

    Direct access speed: 14.998 MB/s

    Cache enable access speed: 9.361718 MB/s

    Ratio: 0.624


  4. Shrumster
    Jan 03, 2009

    Same SD, 2048mb cache file:

    1st Run:
    Direct access speed: 14.185262 MB/s

    Cache enable access speed: 12.212389 MB/s

    Ratio: 0.860921

    2nd Run:
    Direct access speed: 14.14 MB/s

    Cache enable access speed: 10.779 MB/s

    Ratio: 0.7622

    3rd Run:
    Direct access speed: 14.624 MB/s

    Cache enable access speed: 9.853 MB/s

    Ratio: 0.6737


  5. Shrumster
    Jan 03, 2009

    Same SD, full 3763mb cache file:

    1st Run:
    Direct access speed: 14.05 MB/s

    Cache enable access speed: 11.104 MB/s

    Ratio: 0.790

    2nd Run:
    Direct access speed: 14.656 MB/s

    Cache enable access speed: 10.9156 MB/s

    Ratio: 0.7447

    3rd Run:
    Direct access speed: 14.577 MB/s

    Cache enable access speed: 10.617 MB/s

    Ratio: 0.728359


  6. Shrumster
    Jan 03, 2009

    Same SD, 512mb cache file:

    1st Run:
    Direct access speed: 15.184 MB/s

    Cache enable access speed: 10.27 MB/s

    Ratio: 0.676

    2nd Run:
    Direct access speed: 15.41 MB/s

    Cache enable access speed: 9.66 MB/s

    Ratio: 0.626

    3rd Run:
    Direct access speed: 15.68 MB/s

    Cache enable access speed: 9.58 MB/s

    Ratio: 0.611


  7. sirmerlin860
    Jan 04, 2009

    yes your cache is slowing you down. the higher the ratio the better.


  8. Ilya Elenik
    Jan 06, 2009

    What is the “random read speed” displayed in eboostr control panel for your card?
    It seems you are using USB 1 card reader. Unfortunately it will slow up the system due to very low speed



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