Eventid 50, source MrxSMB

[Ted Steenvoorden]

Since a couple of days we are experienceing the following problem:

Our infrastructure consist of 30+ windows 2000 servers
used for a Citrix Farm, file services, print services etc.. A couple of our
servers started producing the following error after a logoff:

EVENTID:50, source MrxSMB
{Lost Delayed-Write Data} The system was attempting to transfer file data
from buffers to \Device\Lanman\Redirector. The write operation failed, and
only some data may have been written to the file.

This error occurs on SP3 and SP4 machines. As a result of this error,
roaming profiles get corrupted. Write cache is disabled on all servers. All
machines are connected to the same network infrastructure. Problem example:

DC3 and DC4 are both Windows 2000 SP4 and have the exact configuration /
hardware. DC3 has no problems, on DC4 when a user logs off, the above error
is written to the eventlog and the roaming profile is corrupted.

This is a very serious error for us, so any help would be appriciated.
Thanx!

Regards,
Ted

 

[Shilpa Sinha [MSFT]]

Hi

This may be of some help.

SYMPTOMS
=========
Under conditions in which the file system is heavily stressed, the
following error message may be displayed:
Lost Delayed-Write Data

The system was attempting to transfer file data from buffers to Filename.
The write operation failed, and only some of the data may have been written
to the file.

You may also receive the following entry in the program log:

Event Type: Warning
Event Source: MRxSmb
Event Category: None
Event ID: 50
Description: {Lost Delayed-Write Data} The system was attempting to
transfer file data from buffers to \Device\LanmanRedirector. The write
operation failed, and only some of the data may have been written to the
file.

The event contains the same text as the error message, but also contains
the error status in the data section. Double-click the event, and then
click Words for the data type; the last word contains the status. If the
status code is c000020c, this hotfix may resolve this issue.

CAUSE
=====
Under heavy disk input/output (I/O) stress condition while an SMB network
connection is being used through the loopback interface, a server (SRV)
thread and redirector (RDR) thread may deadlock.

This behavior has been observed on a Windows 2000 Datacenter Server-based
cluster running Microsoft SQL Server 2000 Enterprise Edition under extreme
disk-stress conditions with a concurrent run of a complex query script and
a database backup.

RESOLUTION
==========
To resolve this problem, obtain the latest service pack for Windows 2000.
For additional information, click the following article number to view the
article in the Microsoft Knowledge Base:
260910 - How to Obtain the Latest Windows 2000 Service Pack

The English version of this fix should have the following file attributes
or later:
Date Time Version Size File name

----------------------------------------------------------------------------
------
04-May-2001 11:48 5.0.2195.3573 1,685,440 Ntkrnlmp.exe
04-May-2001 11:49 5.0.2195.3573 1,685,248 Ntkrnlpa.exe
04-May-2001 11:49 5.0.2195.3573 1,705,856 Ntkrpamp.exe
04-May-2001 11:48 5.0.2195.3573 1,663,360 Ntoskrnl.exe
02-Apr-2001 11:46 5.0.2195.3444 237,072 Srv.sys
04-May-2001 14:25 5.0.2195.3407 73,488 Srvsvc.dll


STATUS
======
Microsoft has confirmed that this is a problem in the Microsoft products
that are listed at the beginning of this article. This problem was first
corrected in Windows 2000 Service Pack 3.

MORE INFORMATION
================
For additional information about the problems that are addressed by the
update that is described in this article, click the article number below to
view the article in the Microsoft Knowledge Base:
288794 - Calling FlushFileBuffers() on Bidirectional File Transfer May
Cause a Deadlock

Reference Link:
http://support.microsoft.com/default.aspx?scid=kb;en-us;293842&Product=win20
00

For more information on the error, goto the following link:
http://support.microsoft.com/default.aspx?scid=kb;en-us;816004&Product=win20
00
This link gives Description of the Event ID 50 Error Message


Shilpa Sinha
This posting is provided "AS IS" with no warranties, and confers no rights.