Data Recovery from file system overwritten with LVM. Post: 302242074

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LEARN ABOUT HPUX

mca_recovery_on

mca_recovery_on(5)						File Formats Manual						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
       system.

       The dynamic tunable is used to enable or disable the MCA Error Recovery functionality.  If disabled, an MCA will cause the system to initi-
       ate  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 parameter 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 values.  For information about the effects of installation on tun-
       able values, 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 Only				mca_recovery_on(5)