my case with sas expander backplane is gooxi rm4024. adaptec bios reads as GOOXI 4024_36V1.0It's not normal, should be around 100 MB/sec (I think), so yeah, something is definitely wrong but I have no idea what it could be.
this backplane has 3 sff-8087 port. it doesn't matter which port i connect to adaptec 78165, i alway get arround 25MB/ speed
could this backplane be the bottleneck ??