Tuesday, August 28, 2012

Severe latency bottleneck detected on ISL / Trunk port

How to troubleshoot error "Severe latency bottleneck detected" on ISL/trunk port?
What can cause this problem and how a root cause can be found?


I faced this problem at one of my customers.
We received this alert on trunk created from two 8Gbit ISL ports between two 5100 switches.

Here is alert message:
Time    Level    Message    Service    Number    Count    Message ID    Switch 
Mon Aug 06 2012 20:32:05 CEST    Warning    Severe latency bottleneck detected at slot 0 port 35.    Switch    1241    1    AN-1010    ASAN01

Saturday, August 25, 2012

IBM DB2: Diagnosing database corruption

Summary:  Learn how to identify and categorize the most common corruption issues while using IBM DB2®. In this article, learn corrective and preventive techniques you can implement to combat corruption issues.

Read more on this link:
http://www.ibm.com/developerworks/data/library/techarticle/dm-1208corruptiondb2/index.html?cmp=dw&cpb=dwinf&ct=dwnew&cr=dwnen&ccy=zz&csr=082412

AIX: Capturing Boot Debug


Capturing Boot Debug

Question

Capturing Boot Debug

Answer

This document can be used to assist in capturing boot debug information which may help determine why a system is hanging during IPL.These steps are valid for AIX 5L and AIX 6.1.

AIX: cfgmgr returning cfgpkcs11 -l pkcs11 0514-040 Error initializing a device into the kernel after clonning AIX from mksysb over a NIM

When cloning AIX 6.1 TL7 SP4 from mksysb receiving error message during first boot and boot process takes too long:

         0 Method error (/usr/lib/methods/cfgpkcs11 -l pkcs11 ):               
         0      0514-040 Error initializing a device into the kernel.

When running cfgmgr receiving this error:

cfgmgr
Method error (/usr/lib/methods/cfgpkcs11 -l pkcs11 ):
          0514-040 Error initializing a device into the kernel.

Friday, August 10, 2012

Breaking limits of LVM, Physical Partitions, Volume Groups in AIX

Are you facing the situation that you can not extend LUN or mirror smaller LUNs to one big LUN in AIX because you reached limit of Physical Partitions in Volume Group?


extendvg VGname hdisk4
      0516-1254 extendvg: Changing the PVID in the ODM.
      0516-1162 extendvg: Warning, The Physical Partition Size of 512 requires the
              creation of 1140 partitions for hdisk4.  The limitation for volume group
              VGname is 1016 physical partitions per physical volume.  Use chvg command
              with -t option to attempt to change the maximum Physical Partitions per
              Physical volume for this volume group.

Is yes, read more :-)

Monday, August 6, 2012

IBM Information Archive CTJIW0239E when open properties of Appliance in ISC


When open properties in Integrated Solution Console in Information Archive Management - System Management - General settings error message CTJIW0239E is received.


CTJIW0239E

The IBM Remote Support Manager for Storage server is unavailable. The configuration settings cannot be determined. 

Wednesday, August 1, 2012

AIX dsmserv Receiving XM_BUFFER error during tape operation

Technote (troubleshooting)

Problem(Abstract)

During a Tivoli Storage Manager Server tape operation , the XM_BUFFER error is logged in the AIX errpt log.

Upgrading Atape device driver in AIX TSM

Technote (troubleshooting)

Source: http://www-01.ibm.com/support/docview.wss?uid=swg21174910

Problem(Abstract)

This document gives the steps for upgrading the Atape device driver in AIX, including reconfiguring the devices in AIX, upgrading Atape, and deleting and redefining the tape paths, drives, and library in TSM.

Resolving the problem

1) From TSM:
Save the output from the device queries, and save the current device configuration (the filename is optional):