Symptom(s):
When using multiple stream backups from Linux* clients to Microsoft Windows 2003 32-bit Servers*, issues can present as:

• "cannot connect on socket(25)"
• "... server is currently not connected to the master server"
• Hangs for ~5 minutes at "begin writing"

Cause:
A logic error within the Intel driver for Windows 2003*.

Solution:
If an Intel® driver release version 14.1 or later is available for your adapter, you should download and install it:
Network Adapter Drivers for Windows Server 2003*

Otherwise you will need to manualy update your adapter's registry key.  Follow these steps:

Stage 1: Determine Device ID

1. Open the device manager (Start -> Run -> Devmgmt.msc)
2. Select the “Details” tab
3. In the dropdown menu, select “Hardware Ids”
   • ex: PCI\VEN_8086&DEV_10C9&SUBSYS_10C98086&REV_00

Stage 2: Determine the Miniports Driver instance

1. Start Regedit (Start  -> Run -> Regedit)
2. Navigate to My Computer\HKEY_LOCAL_MACHINE\System\CurrentControlSet\Enum\PCI\<device id>
   • The device ID will match the key found in stage 1 (ex: 10C9)
3. When this key is opened, you may notice two entries (single port/dual port), open the instance which corresponds to the port of interest.  The first folder is instance one, the second is instance two for that device ID.
4. Note the “Driver” key ex: {4d36e972-e325-11ce-bfc1-08002be10318}\0010

Stage 3: Modify the registry

1. In regedit, navigate to My Computer\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\ HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E972-E325-11CE-BFC1-08002BE10318}
   • The 72 is the key number to look for when scanning the long list of GUIDs which are at this location.
2. Opening this key, the user will see a long list of directories, going from 0000 – xxxx. Open the directory which corresponds the to highlighted value found during stage 2. In this case, 0010.
3. Add a new DWord key titled "MinHardwareOwnedPacketCount" and set the decimal value to 32 (or 20 hex).

 Stage 4: Reset the adapter

1. In Network Properties Disable then Enable the adapter so that the new setting will take effect.

Operating System:

This applies to: