I just upgraded my two parity drives to Toshiba MG08's and did some testing.  I previously had the parity and cache on the onboard SATA ports.  I tried other combos and now have everything on a single cable (channel) on the 9201.  I was surprised that the staggered arrangement wasn't the quickest.

 

I took the rates at 10 minutes in since it seemed like the system had settled into a steady state more or less by then.

 

Motherboard is an ASRock X370M Pro4 and cpu is a Ryzen 5 3600.

 

Edited April 5, 20224 yr by Homerr

Sound interesting for the founding, not objection of the result. But I think

 

- When SSD serve for a period, transfer rate always not linear.

- Not much real different performance between onboard vs HBA

- Different disk configuration in Unraid will got large different result

 

For example for last point, I move two 6TB disk to a new Unraid setup ( B450 onboard SATA ) in 1 parity and 1 data disk ( actually mirror ), I got start speed in 200MB/s+ and average 170MB/s, but those 2 disk in old setup ( multiple disk array ) just ~ average 145MB/s max, no matter onboard / HBA. ( even all disk size is 6TB and same performance class )

 

 

 

Edited April 6, 20224 yr by Vr2Io