On 2014-03-19 09:31, Matias Moreno Meringer wrote:
Hi!

Have a 5.4 currently installed in sd0 and want to build a softraid1 to use
the disk in conjunction with a secondary sd1.

I know a way to build the raid at installation point, but not sure how to
do it after the installation without reinstalling. Is possible?

You cannot "convert" an existing FFS filesystem into a softraid(4) array without backup and restore steps, because the array stores its metadata in the leading sectors. The FFS filesystem within a RAID virtual sd(4) device has a different LBA starting sector on the backing storage.

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