In Array , I have a verify disk (Seagate IronWolf Pro) and three Seagate IronWolf disks.

 

 

 

But for some reason the writing speed suddenly drops (the writing process is writing to disk1)

 

 

Anyone can explain this? thx

Try this:

 

Quote

 

I have tried Turbo Write

but it spins all the disks every time after it starts

Is there a better way to keep writing and only let one of the disks spin?

 

 

You reported the post instead of replying, but basically you can choose between improved write speed with turbo write at the expense of always spinning up all the disks, or the traditional read/write/modify option that is slower but it only spins up the disk you're writing to, and parity, there's a more complete description of both methods in the link above.