Duplicating file system

Christos Chatzaras chris at cretaforce.gr
Wed Feb 20 20:13:19 UTC 2019

> On 20 Feb 2019, at 21:52, Cerebus <kreme at kreme.com> wrote:
> 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.
> -- 
> This is my signature. There are many like it, but this one is mine.

If both disks have the same size the easiest but not fastest way is to use dd:

dd if=/dev/ada0 of=/dev/ada1 bs=64k

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