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IV69994: POSSIBLE DISK I/O HANG ON ADAPTER FIRMWARE ISSUE. APPLIES TO AIX 6100-08

A fix is available

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You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • Some old levels of FC adapter firmware had an issue where
    the adapter would erroneously return an error continuously.
    Normally, that would result in an I/O failure.  However, there
    is one case where it could cause the PCM to indefinitely
    retry reading information from the LUN, causing an I/O hang
    instead of an I/O failure.
    

Local fix

Problem summary

  • Some old levels of FC adapter firmware had an issue where
    the adapter would erroneously return an error continuously.
    Normally, that would result in an I/O failure.  However, there
    is one case where it could cause the PCM to indefinitely
    retry reading information from the LUN, causing an I/O hang
    instead of an I/O failure.
    

Problem conclusion

  • Modified the PCM to check for excessive retries when rereading
    the LUN access state information.
    

Temporary fix

Comments

  • 6100-08 - use AIX APAR IV69994
    6100-09 - use AIX APAR IV69792
    7100-02 - use AIX APAR IV70248
    7100-03 - use AIX APAR IV69803
    

APAR Information

  • APAR number

    IV69994

  • Reported component name

    AIX 610 STD EDI

  • Reported component ID

    5765G6200

  • Reported release

    610

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Submitted date

    2015-02-26

  • Closed date

    2015-02-26

  • Last modified date

    2015-09-30

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

    IV69786

  • 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 U868409

       UP15/09/18 I 1000

PTF to Fileset Mapping



Document information

More support for: AIX Standard Edition

Software version: 610

Operating system(s): AIX

Reference #: IV69994

Modified date: 30 September 2015