Vista Copy Speed over the network is slower that XP SP2 and OSX..much slower?

Discussion in 'Windows Vista Networking' started by Sam, Jun 20, 2008.

  1. Sam

    Sam Guest

    First and foremost..I apologize for posting to this group and the
    Vista General group. I think this one is more appropriate for my issue
    since it is network related...

    We have a client with a new Vista Business x64 Workstation joined to a
    2003 (native) AD domain. The hardware specs are first class (64GB
    RAM, Dual Qaud core 3+GHz Intel Procs, Fastest SATA disks available,
    2 Uber Graphics card in SLI, Giabit NIC, etc.). This machine must move
    large amounts of data to a File Server's SAN frequently (hundreds of
    gigs per upload or download). The problem is uploads and downloads to
    this file server via mapped drive in Vista take considerably longer
    than either an XP Pro SP2 or MacBook Pro from THE SAME network jack.

    What we have done so far with minimal improvements if any:
    1. Disabled active AV scanning on the file server and removed it
    completely on the Vista workstation (were using Trend Micro).
    2. Disabled "Remote Differential Compression".
    3. Disabled SMB 2.0 via registry
    ***at this point the file transfer calculation seemed to start working
    correctly, previously it would estimate it would take 4+ hours to copy
    85Gb of test data when in reality it was finished much much sooner
    (several minutes but forget the exact number now)*** Client reported
    some speed improvements at this point but not that great. From the
    file server during the transfer (when this is the only transfer
    happening on the network) the Gigabit NIC on the server reports a
    network utilization of 30-40%.

    The entire building is wired with Fiber. The file server and SAN are
    connected to a Black Diamond switch with a 1-2GB fiber blade. The
    workstation is connected to a Allied Telesyn Media converter via
    copper/ethernet gigabit connection (media converter routed to same
    fiber blade).

    Next week Im going to do some bench marking with different operating
    systems, data, connections etc. I need to find a fiber card that has
    Vista x64 drivers and see if that helps.

    Any ideas on how I can improve this transfer speed?

    Thanks in Advance!

    Sam, Jun 20, 2008
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  2. You may try to disable auto tuning. This search result may help.
    Vista Slow Issues
    Disable the automatic adjustment (Auto Tuning) for the TCP window size
    on the network. To do this, follow these steps: Click Start , type cmd and
    press ...

    Bob Lin, MS-MVP, MCSE & CNE
    Networking, Internet, Routing, VPN Troubleshooting on
    How to Setup Windows, Network, VPN & Remote Access on
    Robert L. \(MS-MVP\), Jun 20, 2008
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