DOCUMENT:Q99304 09-NOV-1999 [macmail] TITLE :Mac Srv: Server May Stop Operating When Run with Tape Backup PRODUCT :Microsoft Mail For Appletalk Networks PROD/VER:WINDOWS:2.0,3.0,3.1 OPER/SYS: KEYWORDS: ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Mail for AppleTalk Networks, versions 2.0, 3.0, 3.1 ------------------------------------------------------------------------------- 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 "Network Manager's Guide." MORE INFORMATION ================ Most mail servers are classified as "interrupt driven" 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 : Technology : kbMailSearch kbZNotKeyword3 kbMailATN300 kbMailATN310 kbMailATN200 Version : WINDOWS:2.0,3.0,3.1 ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. Copyright Microsoft Corporation 1999.