Can I know how you tested and setup to get this performance? We are using Mini SAS HD interface with RAID controller to PCIe Gen3, but we are not able to get that performance at 2120MB/s that you have published.
I understand that this is u2u platform, I’d just like to listen from the folks out there if there’s anyone who uses SS530 to achieve high performance on sequential write.
For your information, yes, we are using dual SAS ports. The website of WDC states the performance of SS530 is able to achieve 2120MiB/s, however we tested it’s only ~1400MiB/s, significant difference in between.
I use two WUSTR6416ASS204 + Adaptec ASR-8805 + Adaptec 12G HDmSAS cables + Intel 8xSAS 12G single port backplane without SAS expanders.
With block=128K, seq. read or seq. write i get 2+GB/s without any problems seq. read example
But i worry about random 4K performance, i get only 150K IOPS read; 80-100K IOPS write with that disks. I am very dissapointed that extremly low speed. WD lying about real 4K performance of that drives. It must be 440K read and 240K write.