External HDD via eSATA as fast as internal HD??

Discussion in 'Mac Pro' started by Fiercehairdo, May 26, 2009.

  1. Fiercehairdo macrumors member

    Dec 19, 2007
    I have a new Mac pro with a Sonnet Tempo SATA E4P card. Is the external eSATA connection as fast as an internal one?

    More specifically, if I sue an external hard drive, connected via eSATA for a photoshop scratch disk will it be as efficient as an internal disk?

    Many thanks.
  2. grue macrumors 65816

    Nov 14, 2003
    Why would you sue a hard disk? :confused:

    But in all seriousness, yes, it's "in theory" the same as hooking one up internally. In practice I've never actually checked any benchmarks, so YMMV.
  3. Consultant macrumors G5


    Jun 27, 2007
    It's the same.

    Probably thousands of articles / benchmarks on the subject matter.
  4. Thiol macrumors 6502a


    Jan 26, 2008
    Generally yes. JUst be careful because there are some 2.5" enclosures with combo USB/eSATA ports that do not go up to full SATAII speeds. They cap at ~150 MB/s. This really only applies to SSDs.

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