Hi I’m in need of some 12Gb SAS help please.
I’ve bought the short 4U Silverstone case and the extra 5 bay insert that claims to be supportive of 12Gb SAS ( SST-FS305-12G).
Now that I have them home and opened, I have looked inside at the connections they are using and there are no SAS contacts S8 through to S14. I’m now confused because I thought S8 → S14 was the extra data path to make them 12Gb. Am I wrong or what gives?
Edit;
Second edit; apparently it will not affect the speed as the second Tx/Rx pair are already within the contacts which are present in the data contacts. The ‘port B’ section is really meant for connection other devices over SAS.
Panic averted, it’s amazing what a bit of sleep will do aye!
Here are some words from 3M that explains that both sets of data paths are all within the 7 pin data block of the connector;
"3M SAS Connector components are designed on a 1.27 mm (0.05”) in-line contact pitch and are
recognized in three different segments. The first segment is the primary signal portion. SAS signals
have been condensed into a very simple seven contact format. 3M SAS Signal Connectors rely on
two differential pairs (four contacts), which are surrounded and separated by three ground contacts
(G-SS-G-SS-G). The two pairs serve as the transmit (Tx) and receive (Rx) contacts while the three
grounds also function as the EMLB contacts making the 3M SAS Connector hot pluggable. "
3M Ref: https://multimedia.3m.com/mws/media/398703O/3mtm-serial-attached-scsi-sas-connectors-sales-sheet.pdfPreformatted textAdd images