Duplicating file system

[Cerebus]

I have an 11.2 system with two identical SSD drives. Currently I am using rsnapshot to keep backups of the primary drive on the secondary drive, but I am interested in having the second drive have a duplicate copy of the entire file system in a bootable form, updated as the root drive is modified.

How would I do this?

I don’t really want a RAID0 because I want to also keep the periodic backups from rsnapshot as the drives are about 10x larger than my data.

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