This is not enterprise hardware, so maybe won't get much attention. But here I go.
I needed to test a lot of SSDs I bought in the last months, my main computer is a laptop and my server has no spare bays, so I unearthed an old computer that has 6 SATA 6Gbps ports to test my disks. The motherboard is an Asus M5A88-M with an FX-6600 CPU, I got this board long as it supported ECC RAM and 32GB RAM.
I populated all SATA ports and started a full read test, but I noticed the read speeds were very low. I stopped the tests and started one drive at a time. With only one SSD I'm able to saturate the SATA interface, but with two drives bandwidth is capped at around 350MB/s per port. With all 6 drives bandwidth per port is around 120MB/s. The available bandwidth for the SATA controller (or southbridge) seems to be a little over 700MB/s.
Searching a bit the available bandwidth for the SB850 is "2GB/s" which I guess is GigaBytes/s, as 2 GigaBits/s would be 250MB/s.
There are no USB3 devices using bandwidth and no activity on the GbE network, so no other devices are eating up the bandwidth. Any ideas what could be limiting the SATA controller bandwidth? Or down anyone know what the real 880G <-> SB850 bandwidth is?
I needed to test a lot of SSDs I bought in the last months, my main computer is a laptop and my server has no spare bays, so I unearthed an old computer that has 6 SATA 6Gbps ports to test my disks. The motherboard is an Asus M5A88-M with an FX-6600 CPU, I got this board long as it supported ECC RAM and 32GB RAM.
I populated all SATA ports and started a full read test, but I noticed the read speeds were very low. I stopped the tests and started one drive at a time. With only one SSD I'm able to saturate the SATA interface, but with two drives bandwidth is capped at around 350MB/s per port. With all 6 drives bandwidth per port is around 120MB/s. The available bandwidth for the SATA controller (or southbridge) seems to be a little over 700MB/s.
Searching a bit the available bandwidth for the SB850 is "2GB/s" which I guess is GigaBytes/s, as 2 GigaBits/s would be 250MB/s.
There are no USB3 devices using bandwidth and no activity on the GbE network, so no other devices are eating up the bandwidth. Any ideas what could be limiting the SATA controller bandwidth? Or down anyone know what the real 880G <-> SB850 bandwidth is?