Microsoft KB Archive/99304

= Mac Srv: Server May Stop Operating When Run with Tape Backup =

Article ID: 99304

Article Last Modified on 2/27/2007

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APPLIES TO


 * Microsoft Mail for AppleTalk Networks 2.0
 * Microsoft Mail for Appletalk Networks 3.0
 * Microsoft Mail for Appletalk Networks 3.1

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This article was previously published under Q99304



SYMPTOMS
If a tape backup device or software is installed on the same Macintosh as the server for version 2.0, 3.0, or 3.1 of Microsoft Mail for AppleTalk Networks, the server may stop operating at startup or at the time the backup is taking place.



CAUSE
Because both the Mail server and the tape backup process are CPU intensive, neither wants to give up processor time to the other. Consequently, if the tape backup is running at the time the Mail server attempts to process information, the Mail server may stop operating.

Likewise, if the Mail server interrupts the tape backup at the time it is writing data to the tape drive, a bad write may occur and the backup data could be corrupt.



RESOLUTION
Move either the tape backup unit or the Mail server software to a different Macintosh. For detailed instructions on moving a Microsoft Mail Server, refer to chapter two of the &quot;Network Manager's Guide.&quot;



MORE INFORMATION
Most mail servers are classified as &quot;interrupt driven&quot; applications. This refers to the fact that a mail server is interrupted with requests from users, other servers, or its own internal processes. Backup systems write in a continuous data stream to the backup device. If a mail server interrupt is processed by the server, it is possible for the backup system to incorrectly write information, which will cause a corrupt copy of the data.

Additional query words: 2.00 3.00 3.10 Retrospect NetStream crash hang

Keywords: KB99304

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