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Full Discussion: Need Help With System Recovery After HD Errors
Operating Systems SCO Need Help With System Recovery After HD Errors Post 302992700 by spock9458 on Tuesday 28th of February 2017 06:19:57 PM
Old 02-28-2017
I did a full backup of the system after my reinstall, before doing the Restore from my tape. I had to clean the heads of my tape drive, luckily I still had a cleaning tape and it worked. I restored everything except /etc/conf and the job completed "with exceptions" - but I don't know what they were or if important.

The one problem is that /u is a File System, I know this for a fact, but I don't remember what type of File System. After the restore and reboot, it looks like it tried and failed to mount the /u filesystem - it just said "failed to mount". I know this is where most of the inner workings of my legacy application live, so can you tell me what steps to take in order to try and remount this /u file system?

Thanks - you have been VERY helpful and I appreciate it.

---------- Post updated at 04:19 PM ---------- Previous update was at 02:11 PM ----------

Been reading up a little, it looks like I need to run divvy to create the u division on the disk. Old system had root from 539648 - 10000025, and u from 10000026 - 38973679 (40 GB hard drive)

Current system shows root from 539648 -134070446 (140 GB hard drive) I think divvy will let me create the u division and I can probably figure a size. If this is the correct action, should I first delete everything I "restored" to the /u directory? Then would I create and mount the file system, and do a new restore of the /u on the backup tape?

Let me know if I am on the right track, or what else to do. Thanks again.
 

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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)
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