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DB2 - Problem description

Problem IC67407 Status: Closed

DB2DART FAILS TO IDENTIFY INITIALIZED BUT UNUSED EXTENT MAP PAGES THAT ARE
CORRUPT

product:
DB2 FOR LUW / DB2FORLUW / 910 - DB2
Problem description:
In a DMS tablespace, when a table is created, an entire extent 
of Extent Map Pages (EMP) are initialized. Initially, only the 
first page of this EMP extent is used. If an unused EMP page 
becomes corrupted (due to hardware failure), then db2dart is not 
able to idenitfy this corruption. 
If this corrupt page is ever accessed, either as a result of 
growing the table, reorganizing the table, or dropping the 
table, then the database will crash with a bad page error.
Problem Summary:
**************************************************************** 
* USERS AFFECTED:                                              * 
* all                                                          * 
**************************************************************** 
* PROBLEM DESCRIPTION:                                         * 
* In a DMS tablespace, when a table is created, an entire      * 
* extent of Extent Map Pages (EMP) are initialized. Initially, * 
* only the first page of this EMP extent is used. If an unused * 
* EMP page becomes corrupted (due to hardware failure), then   * 
* db2dart is not able to idenitfy this corruption.             * 
*                                                              * 
* If this corrupt page is ever accessed, either as a result of * 
* growing the table, reorganizing the table, or dropping the   * 
* table, then the database will crash with a bad page error.   * 
**************************************************************** 
* RECOMMENDATION:                                              * 
* Upgrade DB2 to 9.1 Fix Pack 10                               * 
****************************************************************
Local Fix:
Use 'db2 inspect' command instead of db2dart
available fix packs:
DB2 Version 9.1 Fix Pack 10  for Linux, UNIX and Windows
DB2 Version 9.1 Fix Pack 11  for Linux, UNIX and Windows
DB2 Version 9.1 Fix Pack 12  for Linux, UNIX and Windows

Solution
Problem was first fixed in Version 9.1 Fix Pack 10
Workaround
not known / see Local fix
BUG-Tracking
forerunner  : APAR is sysrouted TO one or more of the following: IC67422 IC67423 IC67424 
follow-up : 
Timestamps
Date  - problem reported    :
Date  - problem closed      :
Date  - last modified       :
23.03.2010
13.06.2011
13.06.2011
Problem solved at the following versions (IBM BugInfos)
9.1.FP10
Problem solved according to the fixlist(s) of the following version(s)
9.1.0.10 FixList
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