Can SATA drives be placed in SAS-NVMe slots?

[TrumanHW]

System: Dell R7450 with 24x SFF slots supporting NVMe

I know SATA can be used in regular SAS slots.
I know SFF-8639 for NVMe are the exact same as a SAS slot ...
Except having x4 the bandwidth for NVMe

I'd just rather not assume anything and ask (the knowledgeable expert) members here able to confirm this.

 

[i386]

Can SATA drives be placed in SAS-NVMe slots?

In general or specific to that system? (btw I can't find anything with that part number)
The general answer is "it depends".
Bellow is a picture of possible backplane layouts: sata only (top left), sata + sas (top right), sata + sas + nvme (bottom)

Whs "it depends": some vendors route only the pcie pins to the backside (nvme only backplanes), others route the sata + sas to multilane sas ports and the pcie port to a occulink port.

Spoiler: supermicro 743 backplane with 2 sas multilane ports (black connectors) for sata and sas devices and 4 occulink ports (silver connectors)

Except having x4 the bandwidth for NVMe

u.2/3 and m.2 ssds (usually)* aggregate 4 serial links and so does a sas multilan port. with sas4 (24GBit/s) a sas multilane port provides more total bandwidth at lower latencies than pcie 4.0 (16 GBit/s) ssds

*becuase there are some ssds with 2 two pcie lanes

 

[TrumanHW]

General answer: "it depends"

That's a great graphic.

I think what I'll do is look up the Dell Service Tag, get the backplane PN and see the PNs details.

Thank you both for the help (definitely keeping that graphic).

 

[TrumanHW]

In case this ever is relevant to anyone else ...

There's another cable that I believe connects a segment of the backplane (8 drives) to a SAS card ...
I'll update this after I've done it (need to order the cables).