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mca_recovery_on(5)					    mca_recovery_on(5)

NAME
       mca_recovery_on - enable/disable MCA Error Recovery

VALUES
   Failsafe
   Default
   Allowed values
       Minimum:

       Maximum:

DESCRIPTION
       HP-UX  supports MCA Error Recovery to ensure that certain Machine Check
       Aborts (MCA) caused by transient errors do not crash the operating sys‐
       tem.

       The dynamic tunable is used to enable or disable the MCA Error Recovery
       functionality.  If disabled, an MCA will cause the system to initiate a
       crash  dump  and	 then  a  system  reset	 (normal legacy behavior).  If
       enabled, certain MCAs caused by transient events will be recovered  and
       system  execution  resumed.  The recovery action depends on the type of
       MCA and can include termination of a user process.

   Who Is Expected to Change This Tunable?
       System administrators can change the value of depending on the usage of
       the system.

   Restrictions on Changing
       MCA  Error  Recovery  is	 only  supported  on Dual-Core Processors 9100
       Series and later.  On unsupported systems, MCA Error Recovery  will  be
       disabled by default and changing the tunable will not be allowed.

WARNINGS
       All HP-UX kernel tunable parameters are release specific.  This parame‐
       ter may be removed or have its meaning changed in  future  releases  of
       HP-UX.

       Installation of optional kernel software, from HP or other vendors, may
       cause changes to tunable parameter values.   After  installation,  some
       tunable	parameters may no longer be at the default or recommended val‐
       ues.  For information about the effects of installation on tunable val‐
       ues, consult the documentation for the kernel software being installed.
       For  information	 about	optional  kernel  software  that  was  factory
       installed on your system, see at

AUTHOR
       was developed by HP.

	      Tunable Kernel Parameters - Integrity Systems mca_recovery_on(5)

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