Automatic resilver on an additional hard drive

[gyorfitam]

Is it possible to leave an additional hard drive (or 2) in a TrueNAS core system as a "backup drive" (not really sure how to call it)? The idea is to have this drive there ready to take action when a drive fails in the system. For example if I would have 2x 4 hard drive Raidz1 vdevs in a pool (so 8 hard drives in total), I would like to setup a 9th hard drive so if any of the 8 hard drives fails, the system automatically starts to resilver this 9th, "backup drive" instead of ordering a new hard drive and risking another failure until the new hard drive arrives. Is that possible? If yes, how to set it up?

 

[Alecmascot]

Via Pool Manager and add Hot Spare

/core/coretutorials/storage/pools/managingpools/