Running a software RAID1 on 3xSATA drives, How to make 1 a spare?

Hey all-
I’m running a software RAID1 on 3xSATA drives. I’d like to make one a spare. How do I do this? Is there a way so that once I do when I have a drive failure the spare will automatically mount and be made a mirror? Thanks. Ciao.

…bump a dee bump.

Sounds like it should be possible to declare the 3rd disk as a spare in RAID1. Why don’t you try it and let us know the results.

Chapter 14. Linux Software RAID