I had a conversation with Brad yesterday, and he clarified how to set up drives for optimal performance. Short of RAID set ups ($$$), the best performance is attained by isolating tasks to individual drives. If you have two drives, make sure the drive you read from and write to are not the same. If you have three drives make sure the system is on a different drive than the camera/slave and also different then where you read or write. If you have four have the slaves on it.
It sounded like the biggest issue is when you write to the same drive you read from, which is to say send the render output to the same drive you read the files from. One task has to wait. The second biggest issue is the system and other components needing the drive.
Some previous suggestions have had separate drives for each slave, to keep a slave from waiting while the other is reading.
I’m sure there other ways to optimize. If you have further clarifications, share the tips.
Yon