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So a Ubuntu on ZFS installation will use a whole disk and keep /home in that same disk, while traditionally we can partition the disk and mount /home to a separate partition such that reinstall will not wipe out personal data. Using Ubuntu installation ISO to reinstall a Ubuntu on ZFS system, I don't see an option to reinstall the system but keep /home intact. The obvious but laborious solution is to backup /home and then restore it, but I'm looking for a more novel solution.

stz184
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  • There are deeper questions here you're not going into. The key one is: why do you want to reinstall, not simply upgrade? – Liam Proven Jul 21 '22 at 11:17
  • Imagine the system become broken after an upgrade, just for example @LiamProven Anyway, your comment is not exactly the answer I am looking for. – stz184 Aug 05 '22 at 07:27
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    It wasn't an answer, because you do not pose a clear question. Anyway: it has been standard behaviour on Ubuntu for a decade or more that if you install on top of an existing installation, it leaves /home and some other config directories, and just erases the old OS binaries. Perhaps this applies to ZFS as well. Try it in a VM and see? – Liam Proven Aug 06 '22 at 11:21
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    Does this answer your question? Re-install Ubuntu without losing data in home folder – karel Aug 13 '22 at 05:12

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