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  • Delayed write??

    hello!

    Me again

    Well I have a strange problem, never encountered it before...

    I got Delayed write failed or something like that, when batch copying file 11 GB in size...

    Script:

    Code:
    XCOPY /E /Y "C:\Program Files\Microsoft\Exchange Server\Mailbox" "\\192.168.2.150\BACKUP\Exchange_BACKUP" >>log.txt
    Sometimes I get this delayed write error, sometimes script stops with .edb file and reports it as done even though, there are around 480 files left to copy...

    I`m running on VmWare, exchange database.edb is 11.7 GB in size, runniong on gigabit network..

    Strange thing is, that sometimes script works, copies all data like it should, but many times fails and server reboot is necessary...

    Waht am I doing wrong here?

    Thanks for answer!

  • #2
    Re: Delayed write??

    Can you past the complete details from this event from the eventviewer (using the 'copy button' on the right).

    What are the OSs on the exchserver and on the backup computer?


    \Rems

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

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    • #3
      Re: Delayed write??

      OS backup comp. - Windows 2003 32 bit, 4GB RAM
      Exchange 2007 - windows 2003 64 bit, 3.6 GB RAM

      Both have gigabit network.


      Exchange server is virtualised with vmware server and backup is Proliant DL380 G5

      Vmware server sits on another Proliant DL380 G5...


      On another vmware I copy SQL databases in size of 40 GB total, but there are 50 databases, so each file is smaller than 1 GB...


      I suspect that 11GB is just too much to handle?


      But weird, right now, completed successfully, 40 minutes ago it failed...

      Damn!


      P.S.

      Is there another way of auto copying the databases from exchange dir to network server?


      Thanks!

      Comment


      • #4
        Re: Delayed write??

        Originally posted by gregaSLO View Post
        OS backup comp. - Windows 2003 32 bit, 4GB RAM
        Exchange 2007 - windows 2003 64 bit, 3.6 GB RAM

        Both have gigabit network.
        <....>

        P.S.

        Is there another way of auto copying the databases from exchange dir to network server?
        "Exchange 2007/2003 Backup and Restore with NTBACKUP"




        Events similar like these?;

        Event message 1
        Event Type: Warning
        Event Source: MRxSmb
        Event ID: 50
        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.

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


        Event message 2
        Event Type: Information
        Event Source: Application Popup
        Event ID: 26
        Description:
        Application popup: Windows - Delayed Write Failed : Windows was unable to save all the data for the file \\ServerName\VolumeMountPointName\FileName. This data has been lost. This error may be cause by a failure on your computer hardware or network connection. Please try to save this file elsewhere.


        --> http://support.microsoft.com/kb/890352
        This time using an UNC path could be part of the problem.



        \Rems
        Last edited by Rems; 13th August 2007, 19:33.

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

        __________________

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        • #5
          Re: Delayed write??

          Event number 2 happened...

          Will check out the links..

          But NTbackup...

          Hmm Isn`t this online backup?

          Comment


          • #6
            Re: Delayed write??

            Huh...

            Even with ntbackup 11GB transfer over network fails...

            Too large file for M$

            Comment


            • #7
              Re: Delayed write??

              With Xcopy try using the /Z switch to allow you to restart if the copy fails midway. That way if it fails it's not a complete redo - so if a resume is possible it will.
              Last edited by ahinson; 15th August 2007, 16:38.
              Andrew

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              • #8
                Re: Delayed write??

                Hey,

                If this is a virtual machine, this problem is sometimes common. Depends on how the server keeps the IO requests on the disk, sometimes there are delays.

                If I understand you correctly, this happens on a VM under VMWARE?

                I suggest you to check out the EventLog & HP logs on the host machine to see if there are "real" controller/array problems on the host.

                Anyhow, a way to workaround the problem is to increase the following value:

                [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Servic es\Disk]
                "TimeOutValue"=dword:0000003c

                Enjoy.

                Comment


                • #9
                  Re: Delayed write??

                  Yeah, this is VmWare machine...

                  I want to copy data from vmware guest to my Proliant host...

                  This workaround, what value should I enter?

                  Thanks!

                  Comment


                  • #10
                    Re: Delayed write??

                    3c = 60 in decimal (seconds).
                    you can increase it to to 78 (120 seconds).
                    See if it solves your problem.

                    Comment


                    • #11
                      Re: Delayed write??

                      will do that first thing tomrrow!

                      Comment


                      • #12
                        Re: Delayed write??

                        Ahh, and don't forget to rate if it does

                        Comment


                        • #13
                          Re: Delayed write??

                          Thanks!

                          Probably it worked...

                          Did it 2 times without an error...

                          Comment


                          • #14
                            Re: Delayed write??

                            Sry, but still same error

                            Comment


                            • #15
                              Re: Delayed write??

                              Did you checked the host EventLog and HP logs? How many VM machines the host hosts?

                              If the host has no problems, it seems like the server controller cannot keep with IO requests from applications from the host itself or VM's under it within the specified timeout. Try to check if several machines are trying to copy big files/requesting IO at the same time.

                              If this is the case, You can increase the number I give you. It's an hexadecimal value.
                              Otherwise, you should try to schedule such jobs.

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