I have a single 500gb SSD witrh sme10 OS only, had contemplated a raid1 but decided not to with the ssd
Seperate 2tb HD with data mounted in /home/e-smith/files/shares and set in fstab
UUID=a32157ac-70db-4c68-aee7-37e922a9589a / xfs uquota,gquota 0 0
UUID=aa52432c-a8ec-40ed-97bc-0a48ac5fdc56 /boot xfs defaults 0 0
UUID=7829dc97-96e6-4460-8369-910255609175 swap swap defaults 0 0
UUID=566cf197-313c-4109-95f7-155d4913a747 /home/e-smith/files/shares ext3 usrquota,grpquota,,noatime,acl 0 0
I should have formated the data drive with xfs at the time but did this a couple of years ago with sme9
I have spent time creating a raid with multi HDs as data store and doing some testing its not hard, relatively straightforward, wiki has ways and means, but decidied to stay with single data drive at this time, a bit more effort needed with fstab setup as well..
Original setup on sme9 was a raid 1 of 2x1tb HDs, so the data drive was created by simpley copying all that was in the /home/e-smith/files/shares dir to a seperate HD that was not part of the raid, and then mounting it manually at first to confirm all was good and then via fstab..also this system had the shared folders contrib hence /home/e-smith/files/shares/ directory you are free to create/use anything you like almost wherever you like.
I left all user space and ibays on the OS drive, backups of that was a must do
Then leap of faith was to remove data drive and details from fstab, reboot system with original raid disks and then delete contents of /home/e-smith/files/shares/*.*
Put data drive back and re-add details to fstab and reboot, and hope like eff that all was good (I did have backup that was good), it was, all good that is
Now had a system where I could install a clean OS (sme9 or sme10) to a raid or single disk make sure it was good and updated, edit fstab with details as above and reboot..makes migrating a simple and easy process. I remove data drive from fstab and only backup the os drive, the data drive is safe, upograde system to new hardware and OS, put data drive back in edit fstab and so far so good..
This is my way, others would/may do differently, if you try it suggest you do a test setup first with minimal not essential data etc..
Have fun