problem moving big files

macintosh's Avatar


06 Jan, 2013 05:12 PM

I've got 2 external LaCie BigDisk with 2 HDs in RAID 0
one has 2 1TB HDs ; the other 2 4TB HDs
I want to move some big *.mov files from the smaller drive to the bigger drive.
That seems to work very well - at least in the beginning
At the beginning the transfer rate is around 40MB/s but after about 40MB of the first file has been transferred, the transfer rate drops to around 6MB/s
When using rsync from Terminal, I get at consistent transfer rate of around 32MB/s

  1. Support Staff 1 Posted by Dragan on 10 Jan, 2013 12:20 PM

    Dragan's Avatar

    Just to help us investigate... Can you try do the same with Finder? Does it behave differently than Path Finder?

  2. 2 Posted by macintosh on 17 Jan, 2013 04:14 PM

    macintosh's Avatar

    Sorry it's taken me some days to come back to you ;-)
    But I've done some exhaustive testing :
    The problem is exclusively and only seen in PathFinder.
    Finder doesn't have this problem at all, and neither does copying and moving in Terminal using cp, mv and rsync

    I've tried :
    - copying between the two FireWire 800 HDs both ways - copying from either FireWire 800 HD to internal HD both ways - copying between partitions on the internal HD - copying to NAS over GB ethernet using afp

    The transfer rate for Path Finder seems to bottom out at 2.3MB/s

    The OS is 10.8.2 (12C60) ; Path Finder 6.1.2 (1513)

    The strange thing is, I seem to be only having this problem on one of my computers: an iMac 27", ultimo 2009 with everything. On a MacBook Pro 17", primo 2011 with everything I don't see this problem when copying
    - from FireWire HD over GB ethernet via afp - to NAS over GB ethernet via afp

  3. Cocoatech closed this discussion on 12 Jul, 2013 10:44 PM.

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