I'm going to buy an 8-port raid controller for which the declared data trasfer rate is "Up to 6Gb/s per port". The declared connectors are "Two mini-SAS SFF8088". The maximum number of supported physical devices is "Up to 32". The controller is Dell PERC H710.
I'm not sure about the maximum bandwidth I should expect. The server backplane supports 8 SSD slots, so I will not reach the maximum of 32 disks but the maximum of 8 disks.
Supposing each disk able to provide 6Gbps for sequential trasfers, should I expect a maximum bandwidth of 48Gbps, or 6Gbps per mini-SAS (i.e. 12Gbps)?
Also, if the maximum number of physical disks supported is 32, how the bandwidth will distribute between drives, always supposing 6Gbps capable drives? The 48Gbps total bandwidth will be distributed on 32 drives (32 x 1.5Gbps) as on 8 drives (8 x 6Gbps)?