Permanently mount multiple directories from different disks under /

Posted by piotrek on Super User See other posts from Super User or by piotrek
Published on 2014-06-05T00:15:13Z Indexed on 2014/06/05 3:29 UTC
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linux

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partitioning

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mount

I have SSD and HDD. Some directories like /var, /srv and /tmp should be on HDD, while /boot, /usr and /lib on SSD. But do I have to create separate partition for every single directory? I want to have 2 or so partitions. One for each disk and distribute directories as needed. Is it possible and how?

I've heard about symlinks, mount --bind, mhddfs but:

symlinks are treated differently by tools like cp, so I'm not sure if it's safe to have main system directories symlinked
I have no idea how can I use mount --bind or mhddfs in fstab

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