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docs(iso): Explain UEFI/legacy BIOS reqirements (#5)

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hygienic-books 2023-10-27 02:12:09 +02:00
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@ -26,6 +26,12 @@ If you are instead running a legacy BIOS machine ensure these conditions are met
- The `83` Linux partition is mountable, in practical terms this usually only means it has a file system.
- No ZFS zpool exists
Neither with a UEFI nor legacy BIOS system are any of these conditions a requirement from ZFSBootMenu. We're just setting requirements to easily identify if you intend to do a UEFI or a legacy BIOS install. Subsequently the script has no logic to detect UEFI or legacy BIOS mode, that's legwork left to the reader :) The Internet seems to agree that a good quick check is to see if your Arch Linux live CD ISO image has directory `/sys/firmware/efi`.
```
[ -d /sys/firmware/efi ] && echo 'Likely a UEFI system' || echo 'Probably a legacy BIOS system'
```
If you're unsure nothing's stopping you from just giving it a go with a best guess and if that fails you know you guessed wrong.
## How to prep
### UEFI