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Full Discussion: AIX 7.2 MKSYSB Backup and Restore Best Practices?
Operating Systems AIX AIX 7.2 MKSYSB Backup and Restore Best Practices? Post 303033848 by c3rb3rus on Friday 12th of April 2019 10:57:11 AM
Old 04-12-2019
AIX 7.2 MKSYSB Backup and Restore Best Practices?
Hello,

Running AIX 7.2 on Power9 bare-metal (no LPAR and no NIM server), in the process of creating a guide on MKSYSB process.

I understand that MKSYSB is a backup of the rootvg and we can exclude stuff via exclude.rootvg file, the rest of the data volumes are mapped to the system as LUNs via multi-path FC connection to a SAN and that is backed up separately. The rootvg does not boot off SAN, it has two internal NVMe disks.

In the event that rootvg is corrupt and we need to restore rootvg , the process would be to modify the bootlist and reboot into SMS via SSH/Console or using the ASMI service processor.

Are there any critical steps we need to do pre or post-rootvg restore?
  • Currently the rootvg is mirrored, once restored will it remain mirrored?
  • Will i need to mess with the bootlist at all?
  • Will the configuration of the external filesystems be preserved and mounted ready to use (if set to auto-mount at boot)?
  • Running a power system in 24x7 prodution after a MKSYSB restore is viable or should one plan for a fresh re-install of AIX from install media at some point?
  • Does one need access to AIX 7.2 install media at any point during a MKSYSB restore?

The Power9 system has a LTO tape library which is where I was going to write the MKSYSB backup to and boot off, there is no CD-ROM but there is USB - is it possible to boot MKSYSB off USB? Any cons or pros going with tape vs. USB? Most of the guides out there refer to a tape or dvd, though many of them were written years ago.

My plan is to learn from experience and create a MKSYSB via mksysb -iev /dev/rmt0, corrupt rootvg by rm -rf /etc, and reboot. I am pretty sure it will become very unhappy with a missing /etc - so proceed with another reboot (via FPO using Control Panel or ASMI) and boot to SMS for a MKSYSB restore.

Mainly looking for best practices / tips / suggestions around the process.
 

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LEARN ABOUT DEBIAN

gpodder-backup

GPODDER-BACKUP(1)						   User Commands						 GPODDER-BACKUP(1)

NAME

       gpodder-backup - Backup and restore utility for gPodder user data

SYNOPSIS

       gpodder-backup [--create|--extract] <archive.gpo.tar.gz> [options] gpodder-backup --purge

DESCRIPTION

       This utility can be used to create a dump of the current gPodder data (configuration files + downloads), optionally replacing the real con-
       tents of the download folder with zero-byte files (for submitting your data to a bug report without having to transfer lots of data).

OPTIONS

       --version
	      show program's version number and exit

       -h, --help
	      show this help message and exit

       -c <FILE>, --create=<FILE>
	      Create a new archive

       -x <FILE>, --extract=<FILE>
	      Extract an existing archive

       -f, --fake-downloads
	      Store downloads as zero-byte files in backup

       -n, --no-covers
	      Do not include cover files in archive

       -D <DIR>, --destination=<DIR>
	      Extract downloads in different folder

       -P, --purge
	      Remove current data (can be combined with --extract)

USAGE FOR BUG REPORTING

       This command is useful if you want to report a bug in gPodder:

       gpodder-backup --create bug123.gpo.tar.gz --fake-downloads
	      Backup your current data to file bug123.gpo.tar.gz, but don't store download data (create zero-size dummy files  instead).  You  can
	      then attach bug123.gpo.tar.gz to the bug report.

       If you are instructed to try gPodder from a "clean state", you can use the following command (be sure to backup your data before!):

       gpodder-backup --purge
	      Remove all gPodder data, so you can start from a clean state

EXAMPLES

       gpodder-backup --create today.gpo.tar.gz
	      Backup your current data to file today.gpo.tar.gz

       gpodder-backup --extract mybackup.gpo.tar.gz
	      Restore (without purging) the contents of mybackup.gpo.tar.gz

       gpodder-backup --extract default.gpo.tar.gz --purge
	      Remove current data, then restore the contents of default.gpo.tar.gz

       gpodder-backup --purge
	      Remove all gPodder data, so you can start from a clean state

EXTRACTING FAKED DOWNLOADS

       Please  note  that  any	existing  downloads will be overwritten with zero-byte files when using the --extract option of the gpodder-backup
       utility with a backup created with --fake-downloads

AUTHOR

       gpodder-backup was written by Thomas Perl (thp@gpodder.org)

gpodder-backup 1.0						   December 2010						 GPODDER-BACKUP(1)
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