Theoretical maximum data rate on PER740xd with HBA 330 controller and 32x SAS 12Gbps disks

Slunav, 

With the drives and HBA the maximum data rate will be at 12 Gbps hardware wise, with Ceph we couldn't be certain as we don't support or use it.

Hope this helps.

Thanks, Chris.

In here:

http://i.dell.com/sites/doccontent/shared-content/data-sheets/en/documents/dell-poweredge-raid-controller-h330.pdf

The document says:

• Connectors: two x4 internal mini-SAS HD SFF8644
• Data transfer rates: Up to 12Gbps per port; the total number of ports is 8

How are then the x32 12Gbps SAS drives connected to the 8 ports on the PER740xd? Can I use the iDRAC to find out?

Many thanks.

PS: The HBA 330 host bus type is: 8-lane PCIe Gen3 and its theoretical data rate is 7.88 GB/s or 63.04 Gbps (according to https://en.wikipedia.org/wiki/PCI_Express#History_and_revisions)

Hi,

Probably with this guide, you can refer to how the 32 drives are connected to the controller: Figure 143 Page 174: https://dell.to/30BubES;

I manage to find a whitepaper showing some architecture guides on R740XD and HBA330 but it's not using 32 drive configurations, but only 24 which is the front back plane: https://dell.to/3fexMMY

Thanks, Joey

I am sorry, I had a look at:

https://topics-cdn.dell.com/pdf/poweredge-r740xd_owners-manual_en-us.pdf

Figure 143, Page 174 as per your suggestion but I am still unable to find out how the 32 drives are connected to the controller.

Very interesting the reference architecture for Ceph!

Many thanks.