My speed is too slow 12x8T raidz read and write 150m/s?why

[bigfly]

Hello everyone ！
My hardware 12 disk groups raidz
Three LSI 2008 (6g/s).Theoretical read write speed 1.8g/S




I'm going crazy

Fio test write=406mb/s
Fio test read=300mb/s

SMB copy Only 150m/s （10 Gigabit Ethernet and M2 SSD）


but I rebuild the disk array ，
netdata dashboard options Display speed 1G/s Each disk read and write speed is 100mb/s What's the problem ？？？

 

[morganL]

I would reccommend you check i/O depth and io-size .. is it iodepth=1 with i/O size 256KB? If so, performance is bound by latency.

For max bandwidth, you need io (queue) depth of 8+ and prefer I/O size of 1MB.

SMB copy by default has queue depth of 1.....it is latency bound.