IBM Support

IV45777: UPDATE TO AIX 6.1TL08 OR 7.1TL2 OVERRIDES CUSTOM DS8K ATTRIBUTES APPLIES TO AIX 6100-08

A fix is available

Obtain the fix for this APAR.

Subscribe

You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • An AIX or VIOS update to AIX 6.1 TL08 or 7.1 TL02 - based
versions overrides custom DS8k hdisk attributes. Custom
values like reserve_policy & algorithm set to no_reserve
&
round_robin for example are reverted back to the default
values single_path & fail_over for a new DS8k ODM
uniquetype 'PCM/friend/aixmpiods8k'. The same is true for
any/all other customized disk attributes - not just the
examples
provided here.  ALL existing/configured DS8K disks will
revert back to default disk attributes upon upgrade of
AIX or VIOS.

This does not apply to SDDPCM configurations. It affects
only
DS8k configurations with 'PCM/friend/fcpother' uniquetype
and some custom DS8k hdisk attributes.

This applies only to DS8K.  No other storage type is
impacted.  It applies only to DISK attributes - not to
customized adapter attributes.

Local fix

  • Prior to the AIX or VIOS upgrade, save the lsattr -El
output
of all DS8K disks with customized disk attributes. (NOTE:
a snap saved off prior to the upgrade will contain that
information.)

After the upgrade, manually change the attributes back to
the desired custom settings.

Problem summary

  • When updating to AIX 6.1 TL 8 or 7.1 TL 2, DS8K disks managed
by AIX PCM will migrate from "disk/fcp/mpioosdisk" ODM
unique type to "disk/fcp/aixmpiods8k" uniquetype.  In the
process of the ODM uniquetype migration existing customized
DS8K disk instances may have their customized attributes
(CuAt's) deleted resulting in the disk attributes reverting
to the default settings.  "disk/fcp/mpioosdisk" and
"disk/fcp/aixmpiods8k" have similar default attribute values.
Worst case this could result in the reserve_policy reverting
back to "single_path" after an update.  If a disk is accessed
after the update in a clustered,shared environment after the
update and the reserve_policy has reverted, then it can
result in other hosts encountering reservation conflicts
when accessing the shared disk.  This issue does not affect
DS8K disks managed by SDDPCM.

Problem conclusion

  • Preserve customized attribute values for DS8K disks when
migrating ODM uniquetype from "disk/fcp/mpioosdisk" to
"disk/fcp/aixmpiods8k" due to an AIX update.

Temporary fix

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    IV45777
    • 

  • Reported component name
    AIX 610 STD EDI
    • 

  • Reported component ID
    5765G6200
    • 

  • Reported release
    610
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Submitted date
    2013-07-17
    • 

  • Closed date
    2013-07-31
    • 

  • Last modified date
    2014-02-17
    • 





    

  • APAR is sysrouted FROM one or more of the following:
    

    • 

  • APAR is sysrouted TO one or more of the following:
    

    • 



Fix information


    

  • Fixed component name
    AIX 610 STD EDI
    • 

  • Fixed component ID
    5765G6200
    • 



Applicable component levels


    

  • R610  PSY  U859543
       UP14/02/17  I  1000
    • 



PTF to Fileset Mapping








      
              
                            

              

              [{"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"SSLLZP","label":"AIX Standard Edition"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"610","Edition":"","Line of Business":{"code":"LOB08","label":"Cognitive Systems"}},{"Business Unit":{"code":"BU054","label":"Systems w\/TPS"},"Product":{"code":"SSMV87","label":"AIX 6.1 Enterprise Edition"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"610","Edition":"","Line of Business":{"code":"LOB08","label":"Cognitive Systems"}},{"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"SSMVAX","label":"AIX Express Edition"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"610","Edition":"","Line of Business":{"code":"LOB08","label":"Cognitive Systems"}},{"Business Unit":{"code":"BU054","label":"Systems w\/TPS"},"Product":{"code":"SSAUMY","label":"IBM AIX Enterprise Edition"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"610","Edition":"","Line of Business":{"code":"","label":""}},{"Business Unit":{"code":"BU054","label":"Systems w\/TPS"},"Product":{"code":"SG11Q","label":"AIX 6.1 HIPERS, APARs and Fixes"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"610","Edition":"","Line of Business":{"code":"","label":""}},{"Business Unit":{"code":"BU054","label":"Systems w\/TPS"},"Product":{"code":"SG11R","label":"APARs - AIX 7.1 environment"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"610","Edition":"","Line of Business":{"code":"","label":""}}]
              

                          

          
 
        

      

    

      

        

          

            
Document Information


            

            


                        

            Modified date:
            

            17 February 2014
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
Page Feedback