[storage][file_systems] List default partition layouts

[LukeShortCloud]

For each operating system.

[LukeShortCloud]

It's worth noting that lsblk reports information in MiB and GiB by default.

https://askubuntu.com/questions/854958/why-is-the-size-given-by-lsblk-different-from-that-of-lsblk-b

parted reports information in MB and GB by default.

https://unix.stackexchange.com/questions/255079/how-to-make-parted-to-print-size-in-mib-size-instead-of-mb

[LukeShortCloud]

Fedora Workstation >= 34 with Btrfs:

• Partition table: GPT
• Partitions:
  • 1 = 600 MiB = FAT32 = /boot/efi
    • Partition starts: 1 MiB
    • Flags: boot and esp
  • 2 = 1 GiB = ext4 = /boot
  • 3 = 100% = Btrfs = / (subvol=root,compress=zstd:1) and /home (subvol=home,compress=zstd:1)
• Partition gaps: 0 MiB (none)

Additional notes:

• Fedora 34 enabled Zstandard compression for Btrfs.
• Fedora 33 switched to Btrfs for the file system.

https://fedoraproject.org/wiki/Changes/BtrfsByDefault https://fedoraproject.org/wiki/Changes/BtrfsTransparentCompression

[LukeShortCloud]

macOS >= 11 Big Sur (on Apple Silicon):

• Partition table: GPT
• Partitions (TODO: these partitions are not all accurate, need to do further research):
  • 1 = 500 MiB = APFS iSC
  • 2 = 4.9 GiB = APFS Recovery
  • 3 = 100% = APFS = APFS volumes listed below:
    • 1 = Macintosh HD = 8.3 GiB
    • 2 = APFS Snapshot (from OS update) = 8.3 GiB
    • 3 = Preboot = 4.4 GiB
    • 4 = Recovery = 100%
    • 5 = Macintosh HD - Data = 100%
    • 6 = VM = 20.5 KB
  • Partition gaps: TBD

Additional notes:

• iSC is the iBoot System Container which is a replacement for UEFI on Apple Silicon. It contains firmware and trusted boot information.
• macOS 11 Big Sur is the first release of macOS to support Apple Silicon.

https://en.wikipedia.org/wiki/MacOS_Big_Sur https://eclecticlight.co/2021/01/09/boot-disk-layout-on-intel-and-m1-macs-high-sierra-to-big-sur/