Table error: IAM page is linked in the IAM chain for object

Microsoft.SQLServer.2008.Table_error__IAM_page_is_linked_in_the_IAM_chain_for_object_1_5_Rule (Rule)

Knowledge Base article:

Causes

All IAM pages for an index must have the same index ID on them. In this case, one of the IAM pages linked into the IAM chain for index I_ID2 has index ID I_ID1 on it. There are three possible states of this error; they all mean the same thing, but differ in where the discovery is made.

Resolutions

HARDWARE FAILURE

Run hardware diagnostics and correct all revealed problems. Also examine the Microsoft® Windows NT® system and application logs and the SQL Server™ error log to see if the error occurred as a result of a hardware failure. Fix any hardware-related problems.

If you have persistent data corruption problems, try to swap out different hardware components to isolate the problem. Check to ensure that your system does not have write caching enabled on the disk controller. If you suspect this to be the case, contact your hardware vendor.

Finally, you might find it beneficial to switch to a completely new hardware system, including reformatting the disk drives and reinstalling the operating system.

RESTORE FROM BACKUP

If the problem is not hardware related and a known clean backup is available, restore the database from the backup.

DBCC CHECKDB

If no clean backup is available, execute DBCC CHECKDB without a repair clause to determine the extent of the corruption. DBCC CHECKDB will recommend a repair clause to use. Then, execute DBCC CHECKDB with the appropriate repair clause to repair the corruption.

CAUTION: If you are unsure what effect DBCC CHECKDB with a repair clause has on your data, contact your primary support provider before executing this statement.

Repair will patch the IAM chains for both indexes, so they are both correct. IAM page <I>P_ID1</I> will be removed from one or both of the chains.

CAUTION: This repair may cause data loss.

If running DBCC CHECKDB with one of the repair clauses does not correct the problem, contact your primary support provider.

Overrideable Parameters

Name	Description	Default Value
Enabled	Enables or disables the workflow.	Yes
Priority	Defines Alert Priority.	1
Severity	Defines Alert Severity.	1

Element properties:

Target

Microsoft.SQLServer.2008.DBEngine

Category

EventCollection

Enabled

True

Event_ID

8959

Event Source

$Target/Property[Type="SQL!Microsoft.SQLServer.DBEngine"]/ServiceName$

Alert Generate

True

Alert Severity

Warning

Alert Priority

Normal

Remotable

True

Alert Message

Table error: IAM page is linked in the IAM chain for object

{0}

Event Log

Application

Comment

Mom2008ID='{9C098CA4-0426-43E4-AA52-965E82B9A4AC}';MOM2008GroupID={467ECC75-C5DA-42BD-955C-A73BBB51AF74}

Member Modules:

ID	Module Type	TypeId	RunAs
_F6DA1507_12AF_11D3_AB21_00A0C98620CE_	DataSource	Microsoft.Windows.EventProvider	Microsoft.SQLServer.SQLDefaultAccount
GenerateAlert	WriteAction	System.Health.GenerateAlert	Default

Source Code:

<Rule ID="Microsoft.SQLServer.2008.Table_error__IAM_page_is_linked_in_the_IAM_chain_for_object_1_5_Rule" Target="SQL2008Core!Microsoft.SQLServer.2008.DBEngine" Enabled="true" ConfirmDelivery="true" Remotable="true" Comment="Mom2008ID='{9C098CA4-0426-43E4-AA52-965E82B9A4AC}';MOM2008GroupID={467ECC75-C5DA-42BD-955C-A73BBB51AF74}">

  <Category>EventCollection</Category>

  <DataSources>

    <DataSource ID="_F6DA1507_12AF_11D3_AB21_00A0C98620CE_" Comment="{F6DA1507-12AF-11D3-AB21-00A0C98620CE}" TypeID="Windows!Microsoft.Windows.EventProvider" RunAs="SQL!Microsoft.SQLServer.SQLDefaultAccount">

      <ComputerName>$Target/Host/Property[Type="Windows!Microsoft.Windows.Computer"]/NetworkName$</ComputerName>

      <LogName>Application</LogName>

      <Expression>

        <And>

          <Expression>

            <SimpleExpression>

              <ValueExpression>

                <XPathQuery>PublisherName</XPathQuery>

              </ValueExpression>

              <Operator>Equal</Operator>

              <ValueExpression>

                <Value>$Target/Property[Type="SQL!Microsoft.SQLServer.DBEngine"]/ServiceName$</Value>

              </ValueExpression>

            </SimpleExpression>

          </Expression>

          <Expression>

            <SimpleExpression>

              <ValueExpression>

                <XPathQuery>EventDisplayNumber</XPathQuery>

              </ValueExpression>

              <Operator>Equal</Operator>

              <ValueExpression>

                <Value>8959</Value>

              </ValueExpression>

            </SimpleExpression>

          </Expression>

        </And>

      </Expression>

    </DataSource>

  </DataSources>

  <WriteActions>

    <WriteAction ID="GenerateAlert" TypeID="SystemHealth!System.Health.GenerateAlert">

      <Priority>1</Priority>

      <Severity>1</Severity>

      <AlertMessageId>$MPElement[Name="Microsoft.SQLServer.2008.Table_error__IAM_page_is_linked_in_the_IAM_chain_for_object_1_5_Rule.AlertMessage"]$</AlertMessageId>

      <AlertParameters>

        <AlertParameter1>Event ID: $Data/EventDisplayNumber$. $Data/EventDescription$</AlertParameter1>

      </AlertParameters>

      <Suppression>

        <SuppressionValue/>

      </Suppression>

    </WriteAction>

  </WriteActions>

</Rule>