On 06/20/15 14:48, LÉVAI Dániel wrote: > Hi! > > I'm planning to replace my OpenBSD media center, and was going to test > the new [1] RAID 5 features and functions, but I'm really unexperienced > in this field. How does this work; can I create a 4 disks RAID5 array > (w/ bioctl(8)) and then later just add another disk, and fdisk+growfs?
> [1] - http://marc.info/?l=openbsd-tech&m=142877132517229&w=2 I think you did some creative reading of that posting. "Rebuild" means (in this context) replacing a failed disk, not reorganizing the array over more disks. Adding new disks to an existing RAID5 another task (if anyone is even considering it). > Can I create a RAID5(4 disks) and a RAID0(2 disks) array and then create > another RAID0 from these two former softraids? you mean, making a RAID0 from combination of two other softraids? Yes and no -- you can do it, but they don't auto-assemble. I've done this with softraid mirrored disks providing an encrypted softraid disk. The mirror auto-assembles at boot, but the encrypted layer has to be manually activated after boot. So, if you have some data that you want encrypted, this can work -- but the os will probably have to be on non-encrypted space, and you will activate the encrypted space post-boot. Maybe that's useful to you, maybe not. In general, I don't like systems that don't boot to a fully-functional state on their own. Nick.
