NdisWriteErrorLogEntry (NDIS 5.1) function

Note NDIS 5. x has been deprecated and is superseded by NDIS 6. x. For new NDIS driver development, see Network Drivers Starting with Windows Vista. For information about porting NDIS 5. x drivers to NDIS 6. x, see Porting NDIS 5.x Drivers to NDIS 6.0.

NdisWriteErrorLogEntry writes an entry to the system I/O error log file.


VOID __cdecl NdisWriteErrorLogEntry(
  _In_ NDIS_HANDLE     NdisAdapterHandle,
  _In_ NDIS_ERROR_CODE ErrorCode,
  _In_ ULONG           NumberOfErrorValues,
       ...             ...


  • NdisAdapterHandle [in]
    Specifies the handle representing the NIC that is the cause of the I/O error to be logged. This handle is an input parameter to MiniportInitialize.

  • ErrorCode [in]
    Specifies the NDIS_STATUS_XXX code describing the I/O error.

  • NumberOfErrorValues [in]
    Specifies the number of ULONG values to follow this parameter.

  • ...
    Specifies a variable-sized array of ULONGs associated with the error to be logged.

Return value



NdisWriteErrorLogEntry allocates an I/O error log record, fills in the record with the supplied information about the error, and then writes the record to the I/O error log file.

The system places a limit on the potential size of an error log record. For Windows 2000 and later versions, the limit is defined as ERROR_LOG_MAXIMUM_SIZE. The NumberOfErrorValues passed to NdisWriteErrorLogEntry therefore has a system-enforced limit, which is considerably less than the maximum possible value for a ULONG.

In practice, few callers of NdisWriteErrorLogEntry even approach the limit for NumberOfErrorValues because supplying many additional NDIS_STATUS_XXX values is not particularly helpful to the user or system administrator who later reads the error log, using the Win32 event viewer. Logging an I/O error at every possible opportunity is not particularly helpful to users either, so a miniport driver should log only critical I/O errors that can help a user or system administrator to debug a network failure for which the NIC is responsible on a particular machine or a configuration resource conflict discovered during driver initialization.

In general, a NIC driver calls NdisWriteErrorLogEntry during initialization from its MiniportInitialize function if it cannot initialize a NIC that it controls or cannot allocate the hardware resources it needs to carry out I/O operations on its NIC. A NIC driver also can call NdisWriteErrorLogEntry when a device-reset operation fails due to unrecoverable hardware error(s). Logging these kinds of I/O errors helps users or system administrators to identify a badly configured NIC or a NIC with failing hardware components.


Target platform



See NdisWriteErrorLogEntry.


Ndis.h (include Ndis.h)





See also





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