Hi,
I planed on using my B550 AORUS PRO V2 for an unraid build. In intended on using 6 HDDs (~260 MBs max) for the array (possibly adding more in the future) and 2 mirrored NVMEs for cache/appdata, possibly adding 2 normal SSDs for whatever.
I thought about getting a LSI 9305-16i instead of the LSI SAS2008 - mainly because the 2008 is rather old by now and I read a lot about trouble with TRIM signals, as well as reaching lower C-States.
1. Question: Would the 9305-16i improve on that?
Besides that, when I looked into my mainboards specs, its 2 additional x16 slots (the main will hold a GPU) have rather wild asterix to them:
- 1 x PCI Express x16 slot (PCIEX4), integrated in the Chipset: - Supporting PCIe 3.0 x4 mode
(* The M2B_SB connector shares bandwidth with the PCIEX4 slot. The PCIEX4 slot will become unavailable when an SSD is installed in the M2B_SB connectors.)
- 1 x PCI Express x16 slot (PCIEX2), integrated in the Chipset: - Supporting PCIe 3.0 x2 mode
(* The PCIEX2 slot shares bandwidth with the SATA3 4, 5 connectors. The PCIEX2 slot will become unavailable when a device is installed in the SATA3 4 or SATA3 5 connector.)
It also has 2 NVME slots. In my research, I learned that it yeets all the storage besides the main NVME slot through its storage controller, which seems to be PCIe3 x4.
Since I wanted to use both NVME slots, I would be forced to use PCIEX2. Now, Im at a loss how that would function/what would happen, would I slot the 9305-16i in there. It's a PCIe3x8 card - and as far as I understand, it would get the PCIe3x2 as mentioned above. That would be about 2000 MB/s - enough for 8 HDDs. But does it actually work that way? Would, since the card is x8, only certain connectors function?
I figure it's all rather suboptimal, considering everything, even SSDs on the MB SATA would share the bandwith, as well as one of the nvmes?