Hi,
I have been using unRAID for a litte over one year. I am now on 6.11.1. (Because 6.11.2 had format issues I learned after mucking around to add cache pool).
Specs: AMD Ryzen 5950X, Gigabyte X570 Aorus Master, 128GB UDIMM ECC, 4x Seagate Exos SAS 16TB (48TB usable), Kingston KC3000 2TB, 2x Intel P4610 6.4TB, LSI SAS2008 HBA.
I got a good deal on 2 Intel P4610 6.4TB NVMe SSD's, that are capable of 3.2GB/s read/write each.
After finally getting them formatted and in RAID0, copying a 20gb movie from /mnt/nvmecache (KC3000 SSD) to /mnt/u2nvme (P4610 pool) gets 1.4 - 1.6GB/s in power safe profile, 2.5GB/s with ondemand.
But the other way around gets the same. The copy is performed in Krusader. KC3000 is good for ~ 7GB/s.
The diskspeed docker got 2.2GB/s with a single P4610 SSD.
So CPU speed definitely has something to do with transfer speeds. Putting the server on a high performance profile raises the idle power usage on average with 50 to 75 watts, so this is not really an option.
All SSD's are linked with the correct pcie speed with x4 lanes. The P4610's are connected in the lower M.2 slots with adapter cable to U.2. These slots are connected through the chipset. But as the chipset has pcie 4.0x4 to the cpu this should not be the bottleneck.
And I know with RAID0 you never get the speed of both disks combined, but not even reaching the spec speed of one drive is disappointing.
I would have liked > 4GB/s.
Have I configured something wrong? Other test I can do? Please let me know.
starlight-diagnostics-20221109-1824.zip