With a hardware-based RAID0, what happens when a drive fails?
For example, on brand name servers like HP DL120G7 with HP P410, when running FreeBSD on a zfs with a zpool mirror, or DragonFly BSD with mirroring through HAMMER etc.
The following questions come to mind:
Will the data on the non-failed drive that is part of a RAID0 still be usable? Or do the controllers spread the RAID0 data between the drives in a pseudorandom manner?
Would ZFS at all know how the data is spread between the drives for its mirror functionality to function properly?
I've heard some controllers don't let you avoid a hardware RAID (with P410 being such); in such case, do they generally make an exception so as to allow RAID0 arrays of just one disc, instead of a common minimum of two?
When the failed drive is replaced by a datacentre technician, would it affect the data on the drive that has not failed?