Microsoft KB Archive/168357

= XADM: Event ID: 24 Asynchronous Read Page Time Error =

Article ID: 168357

Article Last Modified on 10/28/2006

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APPLIES TO


 * Microsoft Exchange Server 4.0 Standard Edition
 * Microsoft Exchange Server 5.0 Standard Edition
 * Microsoft Exchange Server 5.5 Standard Edition

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This article was previously published under Q168357



SYMPTOMS
Directory replication may stop and the Event Viewer Application Log may display the following error:   Event ID: 24 Source:  EDB Type:    Error Category: Database Page Cache The description may be similar to:   MSExchangeDS ((198) ) Asynchronous read page time error -1018 (   (1:21534, 21304)   (0-24430833), (0-60422491), 1298669031, 1900239879 ) occurred. Please restore the databases from a previous backup.



CAUSE
The Directory database (Dir.edb) most likely has become corrupt. To discover which database is corrupt, start the Windows NT Event Viewer and look in the Application log for the following Event ID:   Event ID: 39 Source:  EDB Type:    Warning Category: Logging/Recovery The description may be similar to:   ((269) ) Unable to read header of database F:\Exchsrvr\Mdbdata\Dir.edb. Error -1206. The file listed in the description is the corrupt database.



RESOLUTION
To resolve this problem, do one of the following:
 * Restore Dir.edb from a previous backup.

-OR-
 * Repair the bad page of data by running Edbutil.exe:

CAUTION: Edbutil.exe is a low-level Exchange database engine utility that defragmentsand checks the consistency of the database. The repair option (which is EDBUTIL /d /r ) attempts to repair bad pages or remove bad pages if the repair is unsuccessful. If a page is removed using the repair option, there most certainly will be data loss.  Make sure you have made a full backup of the Dsadata directory. Make sure you have enough free disk space. You must have more free disk space than the size of the DIR.EDB file. This free space should be on the drive from which Edbutil.exe is run. From the \exchsrvr\bin directory run:

Edbutil /d /r /ds



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MORE INFORMATION
If you receive an error running Edbutil /d /ds /r, you may need to specify the entire path to the Dir.edb file. For example:

edbutil /d c:\exchsrvr\dsadata\dir.edb /r

Refer to the Microsoft Exchange Administrators guide for more details on the use of Edbutil.exe.

Keywords: kbprb kbusage KB168357

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