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Hi Team, I'm going to setup three storage Ceph server with cluster. Each server has 9300-8i controller with 8*2tb sata ssd disks. Overall throughout of 8 drives and per drive throughout is mentioned below. So 4480 MB/s / 8 SSD = 560 MB/s per drive. There is no hardware raid concept here and all will be taken care by Ceph. From just one server calculation. IOPS = (MBps Throughput/KB per IO) * 1024 Iops = 560/4 *1024 = 143,360 560 -- Per drive throughput 4 kb ----- block size So 1,003,520 iops from all the 8 drives? Is this correct calc? Thank you, Raj

Hi JorgeB, Thanks much for your clarification. You cleared my doubt.

Thanks JorgeB again for your valuable reply. Yes I checked your community only to get the details.It was helpful. I hope,my mentioned calculation is correct. Performance testing:- When LSI HBA 9300-8i connected with CPU1 SLOTS PCI-E 3.0 X8 8 lanes x 560MB/s == 4,480 MB/s So 4480 MB/s / 8 SATA SSD = 560 MB/s per drive(i.e 550 MB/s as per your above reply) In this case ,i cannot use x16 lanes for LSI HBA 9300-8i. Can we use CPU1 SLOTS PCI-E 3.0 X16 for SAS 9300-8i for get more performance? Thanks, Raj

Hi Team, I have a Supermicro X10DRL-C 3U server and currently it has below 2 free PCIE slots. CPU1 SLOTS PCI-E 3.0 X8 CPU1 SLOTS PCI-E 3.0 X16 1) Western Digital 2TB WD Blue 3D NAND Internal PC SSD - SATA III 6 Gb/s, 2.5"/7mm, Up to 560 MB/s - WDS200T2B0A 2) LSI Broadcom SAS 9300-8i 8-port 12Gb/s SATA+SAS PCI-Express 3.0 Low Profile Host Bus Adapter The server has 9300-8i HBA controller and connected with 8 WD SATA3 SSD 2TB disks. Performance testing:- When LSI HBA 9300-8i connected with CPU1 SLOTS PCI-E 3.0 X8 8 lanes x 560MB/s == 4,480 MB/s PCIe 3.0 has an high overhead, max usable I can expect alteast 3800 MB/s So 3800 MB/s / 8 SATA SSD = 475MB/s per drive The above calculation is right? Can we use CPU1 SLOTS PCI-E 3.0 X16 for SAS 9300-8i for get more performance? 16 lanes x 560MB/s == 8,960 MB/s So 8960 MB/s / 8 SATA SSD = 1120 MB/s per drive. Im wrong. This calculation is going above drive speed(560 MB/s) ?? Thank you, Raj

Thanks much JorgeB

Thanks much JorgeB for prompt response. For example, If I want to use 24 sata ssd drives with hba 9300,then I can use sas expander. Hba 9300---Sas expander---sas cable----sata ssd disks. Dual link means, I can attach sas cables with 2 ports of sas expander?

Hi All, I'm going to use lsi sas 9300-8i with 8 sata ssd disks. I don't know what is mean by single link and dual link for sas controller?

Im not using any unraid there on server. This is general query. Can you help on this? Thanks, Raj

Hi All, I have a question here. Its regards to LSI SAS 9300-8i & 9207-8i HBA controller. There are totally 3 supermicro servers We are going to purchase LSI SAS 9300-8i and SATA SSD(WD disks).Each server,4 * 2TB SSD disks will be connected. Western Digital 2TB WD Blue 3D NAND Internal PC SSD - SATA III 6 Gb/s, 2.5"/7mm, Up to 560 MB/s - WDS200T2B0A Query 1:- 1) LSI SAS 9300-8i HBA controller maximum speed is 12 gbps and per SATA SSD speed is 560 MB/s. It means 4 disks * 560 MB/s = 2240 MB/s can get from each server. Is that correct? Query 2:- 1) LSI SAS 9207-8i HBA controller maximum speed is 6 gbps and per SATA SSD speed is 560 MB/s. It means 4 disks * 560 MB/s = 2240 MB/s can get from each server. Is that correct? Can I get the same speed only 2240 MB/s when I use any of the two controllers? Thank you, Raj