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+--- Thread: QDA-U2MP as RAID 10 in a TS-h973AX faster than RAID 1? (/showthread.php?tid=7562)
QDA-U2MP as RAID 10 in a TS-h973AX faster than RAID 1? - Pete248 - 09-18-2022
I've just purchased a TS-h973AX.
Now want to populate the 2x U.2 drive bays and decided to get 2x QDA-U2MP and install 4x WD RED NVMe SSDs in a RAID 10 configuration for redundancy with best performance.
On a second thought I'm unsure, whether the RAID 10 configuration will give me any advantages in speed vs. a RAID 1 with 2 of the cheaper QDA-UMP adapters. If the ASMEDIA chip in the QDA-U2MP cuts the bandwidth in halve for each SSD this would be the bottleneck of the setup and the speed would be about the same as with the RAID 1 configuration.
Has anyone made tests whether there is a difference in performance between a RAID 10 with QDA-U2MP adapters and a RAID 1 with QDA-UMP especially in a TS-h973AX?
Thanks
RE: QDA-U2MP as RAID 10 in a TS-h973AX faster than RAID 1? - ed - 09-20-2022
Yes, Asmedia speed will limit those two SSD down to 8GB/s.
https://www.qnap.com/uploads/images/product/driveradapter_QDA-U2MP.png
https://nascompares.com/answer/what-is-pcie-speed-from-gen1-to-gen6/
CPU lane speed is 32GB/s (3.0 x 16) https://www.cpu-monkey.com/en/cpu-amd_ryzen_embedded_v1500b
I hope this helps.
RE: QDA-U2MP as RAID 10 in a TS-h973AX faster than RAID 1? - Pete248 - 09-20-2022
Thanks ed for the info.
Luckily the WD RED SN 700 SSDs I've ordered max out at 3200 MB/s and therefore the Asmedia speed will not limit these in a RAID 10.
But good to know that using faster SSDs in the future won't buy me any advantage when used inside the QDA-U2MP.