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ancorgs/boot-spec.md

Created July 12, 2016 15:54
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boot-spec.md

needed_partitions in a PPC64 system

  • in a non-PowerNV system (KVM/LPAR)
    • with a partitions-based proposal
      • if there are no PReP partitions
        • requires only a PReP partition
      • if the existent PReP partition is not in the target disk
        • requires only a PReP partition
      • if there is already a PReP partition in the disk
        • does not require any particular volume
    • with a LVM-based proposal
      • if there are no PReP partitions
        • requires /boot and PReP partitions
      • if the existent PReP partition is not in the target disk
        • requires /boot and PReP partitions
      • if there is already a PReP partition in the disk
        • only requires a /boot partition
  • in bare metal (PowerNV)
    • with a partitions-based proposal
      • does not require any particular volume
    • with a LVM-based proposal
      • requires only a /boot partition
  • when proposing a boot partition
    • requires /boot to be ext4 with at least 100 MiB
    • requires /boot to be in the system disk out of LVM
    • recommends /boot to be 200 MiB
  • when proposing a PReP partition
    • requires it to be between 256KiB and 8MiB, despite the alignment
    • recommends it to be 1 MiB
    • requires it to be out of LVM
    • requires it to be bootable (ms-dos partition table)
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