Horrid Disk Read Times in WVPC 2007

Discussion in 'Virtual PC' started by Karl E. Peterson, Feb 19, 2010.

  1. We have a WVPC XP VM setup in Windows 7 x64 which is displaying just
    horrible read times when accessing one of the local drives of the host.
    And I mean *horrible* times!

    For example, I can copy a 12MB file from the guest to the host in the
    blink of an eye, but copying the same file from the host to the guest
    takes several minutes. Even doing a simple DIR at the command prompt
    (in a folder with a couple dozen files) shows the sort of noticable
    delay you might get doing it in a folder with several thousand files.

    This bottleneck is limited to *just* the local drives. There is no
    noticable perf problems reading remote/network drives. Mapping the
    local drive to a named drive letter does not help. The VM is in
    bridged network mode.

    Ideas?
     
    Karl E. Peterson, Feb 19, 2010
    #1
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  2. Karl E. Peterson

    C A Upsdell Guest

    I have the same problem on my XP machine. Testing sites on my local
    hard drive is very painful, because it is so terribly slow.
     
    C A Upsdell, Feb 19, 2010
    #2
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  3. Karl E. Peterson

    Robert Comer Guest

    The interface between the host and guest is just slow and I suspect
    it's a bug.
     
    Robert Comer, Feb 20, 2010
    #3
  4. I can't say I've seen this on any other VMs, though? I just tried
    another, on a different host, and I could sling a 22MB file in moments
    from host to guest.
     
    Karl E. Peterson, Feb 20, 2010
    #4
  5. Karl E. Peterson

    Robert Comer Guest

    I can't say I've seen this on any other VMs, though? I just tried
    With WVPC? Was VBOX perchance installed also on that box?

    It's slow on all my machines, but I don't think every machine behaves
    this way. I don't know the cause.
     
    Robert Comer, Feb 20, 2010
    #5
  6. It seems highly VM specific, here, so there's gotta be a configuration
    issue in play.
     
    Karl E. Peterson, Feb 22, 2010
    #6
  7. Karl E. Peterson

    Robert Comer Guest

    It seems highly VM specific, here, so there's gotta be a configuration
    Networking set to NAT vs the physical NIC? I almost always use the
    physical NIC.
     
    Robert Comer, Feb 22, 2010
    #7
  8. That might be it, yep! I just tried on another with NIC, and it was
    also painfully slow reading a host share.
     
    Karl E. Peterson, Feb 22, 2010
    #8
  9. Karl E. Peterson

    Robert Comer Guest

    I'll do some testing to when I get a chance, never thought there might
    be a difference there...
     
    Robert Comer, Feb 22, 2010
    #9
  10. After some more testing here, this (NAT vs NIC) doesn't seem to be the
    issue. <sigh>
     
    Karl E. Peterson, Mar 2, 2010
    #10
  11. Karl E. Peterson

    Robert Comer Guest

    Bummer. I've heard of good results with 2 NIC's, one dedicated to VM's.
    (not sure about this one either.)

    Have you tried a normal RDP session? I think that would be another thing to
    try and I'll do that.

    What I've been doing is copying the file to an external PC or server and
    then to the host/guest. (I really don't need to copy things between them
    all that much, so it's workable)
     
    Robert Comer, Mar 2, 2010
    #11
  12. Don't want to go there just so someone can run a 16-bit app written 30
    RDP from host to guest, or vice-versa? Never even considered it.
    What's the file transfer mechanism? (I ususally use mstsc, which means
    ftp of course. Maybe you're thinking something like UltraVNC with a
    built-in mechanism?)
    LOL! That just might be the simplest answer! Sling it over to a
    server. Oh my, IT will love this new and practical form of abuse. <eg>
     
    Karl E. Peterson, Mar 2, 2010
    #12
  13. Karl E. Peterson

    Robert Comer Guest

    RDP from host to guest, or vice-versa?

    Host to guest.
    Just another path, the built in display is based on mstsc, but it's not
    identical, so if the bug is in the custom version, then normal mstsc might
    work. I'm not really betting on it though. normal mstsc has drive sharing
    abilities too...
     
    Robert Comer, Mar 2, 2010
    #13
  14. Riiiiight! I dunno why, but I always forget mstsc can share drives
    too! I tend to uncheck that, and just share the clipboard. Worth a
    try, yeah.
     
    Karl E. Peterson, Mar 3, 2010
    #14
  15. Karl E. Peterson

    Bo Berglund Guest

    How do you share a drive in an RDP session?
    I never ever saw that....
     
    Bo Berglund, Mar 3, 2010
    #15
  16. Karl E. Peterson

    Robert Comer Guest

    Local resources tab -> local devices and resources -> More button, then it's
    self explanatory. I don't know what version that came in on, so it might
    not be there if you have something old, but I've been using it a long time.
     
    Robert Comer, Mar 3, 2010
    #16
  17. Karl E. Peterson

    Robert Comer Guest

    Riiiiight! I dunno why, but I always forget mstsc can share drives too!
    It didn't help, so don't bother. :( (it's actually slower)
     
    Robert Comer, Mar 3, 2010
    #17
  18. Karl E. Peterson

    Bo Berglund Guest

    There is no tab, just a single window titled <computer name> - Remote
    Desktop and containing the desktop of the remote computer....
    Everything I do there pertains to the remote PC.
    ?????
     
    Bo Berglund, Mar 3, 2010
    #18
  19. Karl E. Peterson

    Robert Comer Guest

    Not there, when you set up a connection, it's on that dialog. You have to
    set it up before the connection is made.
     
    Robert Comer, Mar 3, 2010
    #19
  20. Crap. :-(
     
    Karl E. Peterson, Mar 3, 2010
    #20
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