Lets say I have 4 drives connected through SAS to the pool and I have no duplication turned on. The files in the pool are all 40GB ISO files.
Now I add 4 more identical drives to the pool via SAS. ( I know drivepool doesn't care how they are connected)
Now I turn on 2x duplication.
Will Stablebit drivepool copy 1 file at a time?
Maybe it ends up doing 4 copies at the same time because it has 4 disks to read from and 4 to write to?