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<blockquote data-quote="SpudR" data-source="post: 886452" data-attributes="member: 54104"><p>If you would like I'll get all technical here...</p><p>The main problem with Gb networking isn't really the networking bit at all - it's the HDDs and the speed that they can dump the data to the bus.</p><p>The PCI bus used can only go to the theoretical limit of 133 MB/s - GB ethernet max is 125 MB/s but you have to remember that everything is using the PCI bus in the PC. Every card you add in grabs some of the bandwidth = slower transfer speed.</p><p>PCIe gives 250MB/s to each channel - that's why its seriously faster.</p><p> </p><p>To test you could always try transferring from a RAM disk - this eliminates the fragmentation and HDD problems.</p><p> </p><p>Here's a few tips - hopefully something should work!</p><ul> <li data-xf-list-type="ul">Make sure ALL the NICs are PCIe - I have yet to get a good Gb network speed on PCI NICs for the reason above.</li> <li data-xf-list-type="ul">Set the NICs to 1000/full</li> <li data-xf-list-type="ul">Disable any QOS you have going on</li> <li data-xf-list-type="ul">Make sure you have fast HDDs and are getting good throughput on them (5400 ain't too good for this, best with SSDs)</li> <li data-xf-list-type="ul">Disable Checksum Offloading</li> <li data-xf-list-type="ul">Disable any 'Green' or 'Eco' networking crap</li> <li data-xf-list-type="ul">Try changing the settings for - Jumbo Frames and flow control</li> <li data-xf-list-type="ul">Try disabling 'Auto tuning' - start >> run >> cmd >> netsh interface tcp set global autotuninglevel=disabled</li> <li data-xf-list-type="ul">Defrag your drives</li> <li data-xf-list-type="ul">Make sure your derives are not compressed (right click drive >> properties)</li> <li data-xf-list-type="ul">If Windows 7 - try disabling the 'Link-layer Topology Discovery Mapper I/O Driver'</li> <li data-xf-list-type="ul">Check your cables runs are as short as they can be and are away from power cables.</li> <li data-xf-list-type="ul">Try disabling SMB:</li> <li data-xf-list-type="ul">start >> run >> cmd >> <br /> sc config lanmanworkstation depend= bowser/mrxsmb10/nsi<br /> sc config mrxsmb20 start= disabled<br /> (change disabled to auto to reenable SMB)</li> <li data-xf-list-type="ul">Open the registry to 'HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\lanmanworkstaion'. <br /> Check DWORDs 'MaxCmds','MaxThreads' and 'MaxCollectionCount' under this branch.<br /> Assign them a value of MaxCmds = 30, MaxThreads = 30 and MaxCollectionCount = 32 - make them if they are not there. <br /> After you restart your system, you should see an increase in the performance.</li> </ul><p>Don't forget that your drives will have a real speed difference for read/write performance. Slow read or write on one drive will effect performance.</p><p>Also - try RoboCopy - it uses some of the changed API of the SMB copy.</p><p>If you are getting a transfer speed of about 20-80 mb/s you are doing quite well!</p></blockquote><p></p>
[QUOTE="SpudR, post: 886452, member: 54104"] If you would like I'll get all technical here... The main problem with Gb networking isn't really the networking bit at all - it's the HDDs and the speed that they can dump the data to the bus. The PCI bus used can only go to the theoretical limit of 133 MB/s - GB ethernet max is 125 MB/s but you have to remember that everything is using the PCI bus in the PC. Every card you add in grabs some of the bandwidth = slower transfer speed. PCIe gives 250MB/s to each channel - that's why its seriously faster. To test you could always try transferring from a RAM disk - this eliminates the fragmentation and HDD problems. Here's a few tips - hopefully something should work! [LIST] [*]Make sure ALL the NICs are PCIe - I have yet to get a good Gb network speed on PCI NICs for the reason above. [*]Set the NICs to 1000/full [*]Disable any QOS you have going on [*]Make sure you have fast HDDs and are getting good throughput on them (5400 ain't too good for this, best with SSDs) [*]Disable Checksum Offloading [*]Disable any 'Green' or 'Eco' networking crap [*]Try changing the settings for - Jumbo Frames and flow control [*]Try disabling 'Auto tuning' - start >> run >> cmd >> netsh interface tcp set global autotuninglevel=disabled [*]Defrag your drives [*]Make sure your derives are not compressed (right click drive >> properties) [*]If Windows 7 - try disabling the 'Link-layer Topology Discovery Mapper I/O Driver' [*]Check your cables runs are as short as they can be and are away from power cables. [*]Try disabling SMB: [*]start >> run >> cmd >> sc config lanmanworkstation depend= bowser/mrxsmb10/nsi sc config mrxsmb20 start= disabled (change disabled to auto to reenable SMB) [*]Open the registry to 'HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\lanmanworkstaion'. Check DWORDs 'MaxCmds','MaxThreads' and 'MaxCollectionCount' under this branch. Assign them a value of MaxCmds = 30, MaxThreads = 30 and MaxCollectionCount = 32 - make them if they are not there. After you restart your system, you should see an increase in the performance. [/LIST] Don't forget that your drives will have a real speed difference for read/write performance. Slow read or write on one drive will effect performance. Also - try RoboCopy - it uses some of the changed API of the SMB copy. If you are getting a transfer speed of about 20-80 mb/s you are doing quite well! [/QUOTE]
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