[SOLVED] Delayed Write Failed

[2manycables]

After installing EMC Retrospect 7.7 backup software on XP Pro SP3, I was consistently getting "Delayed Write Failed" messages while trying to backup to the NAS (809-Pro fw 3.2.1):

XP Admin Tools Event Viewer entry:

Code: Select all

Event Type:	Warning
Event Source:	MRxSmb
Event Category:	None
Event ID:	50
Date:		7/3/2010
Time:		3:15:45 AM
User:		N/A
Computer:	COMPUTER_NAME
Description:
{Delayed Write Failed} Windows was unable to save all the data for the file \Device\LanmanRedirector. The data has been lost. This error may be caused by a failure of your computer hardware or network connection. Please try to save this file elsewhere.

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
Data:
0000: 04 00 04 00 02 00 56 00   ......V.
0008: 00 00 00 00 32 00 04 80   ....2..€
0010: 00 00 00 00 0c 02 00 c0   .......À
0018: 00 00 00 00 00 00 00 00   ........
0020: 00 00 00 00 00 00 00 00   ........
0028: 0c 02 00 c0               ...À    

======== DATA in words ============

Data:
0000: 00040004 00560002 00000000 80040032
0010: 00000000 c000020c 00000000 00000000
0020: 00000000 00000000 c000020c 

After surfing around a bit, I found this solution:

http://support.microsoft.com/kb/296264/

After creating & setting HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\MRXSmb\Parameters\
OplocksDisabled to REG_DWORD = 1 on the XP client and then rebooting it, my network throughput (as reported by Retrospect) on the backup nearly doubled, and the delayed write problem disappeared.

While I probably could have played with the smb.conf file on the NAS and done something with oplocks therein, this was easier to implement.

[waninae39]

THANK YOU VERY much!

i have been seeing this issue recenetly after i moved Thunberbird mail files from local machines to the NAS.
Each user was seeing the same Delayed Write Failed message when mail was received or the Thunderbird client was started.

i will see if our retrospect BAckup is now faster