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linux - How to boot from SSD but have installations and home folder on HDD


I have an SSD I want to boot from it, but use the HDD to store installed programs and keep the home folder.


I'm running Linux Fedora 19.


How do I set that up?



Answer



During installation you will be asked which disk to use and which partitions to mount. Reading you question I think you want this:


[SSD]
/boot
/
SWAP


[HDD]
/usr
/tmp
/home

Why this?


[SSD]



  • /boot from the SSD (not much here, /boot is only a very small filesystem needed to start and optionally to decrypt a volume.

  • / on the SSD since you will be accessing it quite often en thus gain a large speed gain. / (the root filesystem) is usually quite small and it is here where you usually have the mount points for other filesystems such as /usr, /usr/local, /opt, /var, /lib etc. Some of these you want to keep on /, such as var and lib. Others such as /usr/, /usr/local/ and /home are best mounted from another partition.

  • SWAP since paging depends a lot on the disk speed. Thus is gains the most from the SSD. And with modern SSD there is no reason not to do this. A modern SSD (read: any SSD manufactured in the last decade) can sustain heavy writes for years. Your computer will be old and discarded before you reach this limit).


[HDD]



  • /usr on the HDD since you ask to use the HDD for the programs. Most of these are stored in /usr (OS/distribution provided) or in /usr/local (self installed).

  • /home for the same reason.

  • /tmp is a choice. If you have sufficient memory then /tmp in RAM makes a lot of sense. If you use it to also store temporary ISOs etc then using a partition makes more sense.


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