I am running oracle8.1.7 on a linux server, the server was down last night during a shutting down to do a cold backup. I notice some errors in alert log and trace file but quite don't understand the root cause. Can someone look at errors and explain to me if my cold backup is a root cause that brought server down. I really appreciate your helps. +ACoAKgAq-Alert log: Thu Dec 23 01:01:01 2004 Shutting down instance (immediate) License high water mark +AD0- 7 Thu Dec 23 01:01:01 2004 ALTER DATABASE CLOSE NORMAL Thu Dec 23 01:01:01 2004 SMON: disabling tx recovery SMON: disabling cache recovery Thu Dec 23 01:01:01 2004 Thread 1 closed at log sequence 36120 Thu Dec 23 01:01:01 2004 Errors in file /u01/app/oracle/admin/insidera/udump/ora+AF8-31883.trc: Thu Dec 23 01:01:01 2004 Errors in file /u01/app/oracle/admin/insidera/udump/ora+AF8-31883.trc: Thu Dec 23 01:01:02 2004 Errors in file /u01/app/oracle/admin/insidera/udump/ora+AF8-31883.trc: Thu Dec 23 09:26:44 2004 Starting ORACLE instance (normal) LICENSE+AF8-MAX+AF8-SESSION +AD0- 0 LICENSE+AF8-SESSIONS+AF8-WARNING +AD0- 0 +AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQA9AD0APQ- +ACoAKgAq- TRACE file: +ACQ- cat /u01/app/oracle/admin/insidera/udump/ora+AF8-31883.trc /u01/app/oracle/admin/insidera/udump/ora+AF8-31883.trc Oracle8i Enterprise Edition Release 8.1.7.0.1 - Production With the Partitioning option JServer Release 8.1.7.0.1 - Production ORACLE+AF8-HOME +AD0- /u01/app/oracle/product/8.1.7 System name: Linux Node name: insidera Release: 2.4.18-14smp Version: +ACM-1 SMP Wed Sep 4 12:34:47 EDT 2002 Machine: i686 Instance name: inra Redo thread mounted by this instance: 1 Oracle process number: 8 Unix process pid: 31883, image: oracle+AEA-insidera +ACoAKgAq- SESSION ID:(8.8648) 2004-12-23 01:01:01.636 Exception signal: 11 (SIGSEGV) +ACoAKgAq- 2004-12-23 01:01:01.715 ksedmp: internal or fatal error Current SQL statement for this session: ALTER DATABASE CLOSE NORMAL ----- Call Stack Trace ----- calling call entry argument values in hex location type point (? means dubious value) -------------------- -------- -------------------- ---------------------------- Exception signal: 11 (SIGSEGV) +ACoAKgAq- 2004-12-23 01:01:01.891 ksedmp: internal or fatal error Current SQL statement for this session: ALTER DATABASE CLOSE NORMAL ----- Call Stack Trace ----- calling call entry argument values in hex location type point (? means dubious value) -------------------- -------- -------------------- ---------------------------- Exception signal: 11 (SIGSEGV) +ACoAKgAq- 2004-12-23 01:01:02.067 ksedmp: internal or fatal error Current SQL statement for this session: ALTER DATABASE CLOSE NORMAL ----- Call Stack Trace ----- calling call entry argument values in hex location type point (? means dubious value) -------------------- -------- -------------------- ---------------------------- Shadow+AF8-Core+AF8-Dump +AD0- PARTIAL -- //www.freelists.org/webpage/oracle-l