hi peeps.
Dunno if this might help. Found a solution that seems to work.
I had as well 43MB-430MB W/R, Lacie Big 6 84TB, MacBook Pro 13" M1.
just did this and jumped to 1000MB/s for both R/W
Apple disc utility - erase
SoftRaid 6.2.1 Initialize
SoftRAid New Volume RAID 0
=> LaCie RAID Manager keeps recognizing the Big 6 as Raid 5 and does not appear to have issues with the new system as if nothing happened. If true or not this I don't know yet.
the speed jumped up to 1000, see attachment.
it's not the 1400/MB/s they declared but temporarily better.
is it safe ? I have no clue
I just forwarded the same info to Lacie's support as the person I got in touch with seemed to not know as well.
asked/suggested that Lacie might need to check with SoftRaid Driver and possibly fix.
suggested warranty should be be extended and not start until they resolve problem. 43MB/s is not acceptable for a professional external drive + should offer option of refund if not resolved within 60 days + keep all clients with this issue informed and demonstrate support.