主题： upgrade

• Planning an in-place major upgrade of RHEL with Leapp

  Leapp upgrades RHEL 8 to 9, or 9 to 10, in place, but only after every upgrade-blocking finding in its preupgrade report is resolved. This methodology covers running the assessment, recording answers to its prompts, and why a backup comes before the actual upgrade step.

  methodology · en · reviewed · 知识截至 2026-09-24

• Backing up and cloning AIX: mksysb, savevg, and low-risk upgrades with alt_disk_copy

  mksysb creates a bootable backup of rootvg (savevg backs up a non-root volume group, not bootable, restored with restvg); lsmksysb reads back what a mksysb image contains without restoring it. alt_disk_copy and alt_disk_mksysb clone or update rootvg onto a spare disk so a bootlist change, not a restore, is the fallback if the new level misbehaves.

  methodology · en · reviewed · 知识截至 2026-09-24

机器可读： JSON