@Benson, nice generalisation, although for this use case it would be great if disks are pre-cleared at maximum speed. It would stress each drive to its full potential and maximise the chance of reporting early drive mortality that can happen during this stage.
@BRiT, the writes are fluctuating up and down and during the clearing stage when new drives are added to the array, nothing is being written to the parity drive (0.0 B/s).
@itimpi, absolutely sure I mean pre-clearing*. This occurs automatically when a new drive is added to the disk array.
Another thing that can be observed is that drives that have underwent the clearing step are still waiting for the remaining new drives to finish clearing before they are mounted to the array (Disk 5). In my view drives that have successfully been pre-cleared have to be mounted to the array without waiting for remaining drives to complete.
*seems like people refer to pre-clearing when the drive is cleared before being assigned to the array, so in unRAID terms, I mean clearing