38 lines
1.4 KiB
Markdown
38 lines
1.4 KiB
Markdown
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# I want to install a system flake on the same disk as always
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Well if the parititions have the same properties like UUID and Label
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as specified in the `configuration.nix`
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# I want to install a system flake in a different disk
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Imagine we order a new disk or just want to prepare one to be compatible
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with our flake configurations, we need to make sure the disk is ready
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Firstly lets say you plug it into the machine and its named /dev/sdc,
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but it can be named and located anywhere else
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## Lets prepare the disk but what if i dont want to wipe the entire disk?
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Lets make sure we have two partitions, if not create them:
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- NIXBOOT (/dev/sdc1, FS; EXT4 UUID: `fdea0ef2-fa72-11ed-8a6f-e39e300c6f30` Label: NIXBOOT)
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- NIXROOT (/dev/sdc2, FS: FAT32 UUID: `D393-D3D1` Label: NIROOT)
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...
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## What if they already exist but the UUID are not equal?
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If the partitions already exist but the UUID is not the same, it can
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be changed by doing:
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- First a fsck check with `e2fsck -f /dev/sdc1`
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- Then change the uuid with `tune2fs /dev/sdc1 -U fdea0ef2-fa72-11ed-8a6f-e39e300c6f30`
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Do the same process but for the other partition with its respective UUID
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# What if i forgot or don't know how disks work?
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Well there is a great well paced video to follow here
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https://www.youtube.com/watch?v=2Z6ouBYfZr8
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Also a good reference for changing UUIDs and so on
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https://linuxconfig.org/how-to-retrieve-and-change-partitions-universally-unique-identifier-uuid-on-linux
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