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Re: Move /gnu/store to another filesystem

From: Tobias Geerinckx-Rice
Subject: Re: Move /gnu/store to another filesystem
Date: Fri, 27 May 2022 13:28:52 +0200

Hi Théo,

Théo Maxime Tyburn 写道:
I figured out where the problem came from. I forgot to use the -p option
while copying the store with cp.

I think this will probably work (I mean—it obviously did, but also longer-term).

However, ‘cp -p’ does not preserve everything, including hard links. Applications shouldn't care but you might be surprised at how much disc space hard links save on my system:

~ λ du -hs /gnu/store
86G     /gnu/store
~ λ du -hs --count-links /gnu/store
192G    /gnu/store

I was!

‘cp -a’ should preserve hard links but I personally recommend using rsync instead, with a paranoid helping of -aHAX flags. Unlike cp, it's resumable, which is nice when copying 100s of gigabytes.

Kind regards,


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