I know, strange, I moved the boot-pool from a ssd to a nvme connected via an adapter to a usb3 on the mb, and I´m trying to figure out it is a bad idea or the adapter its doing its job. I´m still playing with it trying to find the best configuration, before I install the good drives and go live,
The best command i found its diskinfo -t /dev/adaX its not 100% but to get an idea. this are the values I get.
2.5" HDD 1
Transfer rates:
outside: 102400 kbytes in 1.152412 sec = 88857 kbytes/sec
middle: 102400 kbytes in 1.356927 sec = 75465 kbytes/sec
inside: 102400 kbytes in 2.283349 sec = 44846 kbytes/sec
2.5" HDD 2
Transfer rates:
outside: 102400 kbytes in 1.014331 sec = 100953 kbytes/sec
middle: 102400 kbytes in 1.236002 sec = 82848 kbytes/sec
inside: 102400 kbytes in 1.981105 sec = 51688 kbytes/sec
NVME on usb3 addapter
Transfer rates:
outside: 102400 kbytes in 0.445237 sec = 229990 kbytes/sec
middle: 102400 kbytes in 0.445095 sec = 230063 kbytes/sec
inside: 102400 kbytes in 0.448314 sec = 228411 kbytes/sec
SSD on Sata3
Transfer rates:
outside: 102400 kbytes in 0.203054 sec = 504299 kbytes/sec
middle: 102400 kbytes in 0.198788 sec = 515122 kbytes/sec
inside: 102400 kbytes in 0.204655 sec = 500354 kbytes/sec