Type of SFP+ Transceivers required for an ME4024

Rickzzz
Rickzzz used Ask the Experts™
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We recently purchased an EMC ME4024. I have tried several SFP+ transceivers and DAC Twinax SFP+ transceivers to no avail. The device GUI notes they are incompatible when inserted. Can anyone direct me to the correct transceivers to drop in this thing? Maybe something I can go straight to Amazon to purchase. Thank you in advance!!

Btw, I'm connecting it to the switch below for iSCSI config to 2  PE-640 Server 2016 hosts (Qlogic SFP+ network controllers).
MikroTik 5-Port Desktop Switch, 1 Gigabit Ethernet Port, 4 SFP+ 10Gbps Ports (CRS305-1G-4S+IN)
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Top Expert 2016

Commented:
who makes the sfp+ port? Make and model would be nice.
Distinguished Expert 2017

Commented:
You have two variables with sfp+ transceivers.
One whether the transceiver us recognized by the switch the second whether the tranceiver you got works with the cabling.
Single mode or multi-mode.

And then what is on the other end.
Distinguished Expert 2017

Commented:
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Author

Commented:
David, CD...

This is the only description of the default controller for the 4024: "CNC 8 Port Dual Controller for iSCSI SFP+ and/or FC 403-BBXQ"... actually its 4 port x2 controllers in redundancy. This is the default hardware, Dell does not even sell transceivers for it.

My question, as posed, was to someone that actually bought one, like I did but worked it out. I assumed that would have been obvious. It would be even nicer if you moved on.

Author

Commented:
Thank you Arnold, some direction is great. Reply back shortly.
Top Expert 2014

Commented:
Maybe it's 12Gb SAS, would need serial no to look up on Dell's website to confirm.
Distinguished Expert 2017

Commented:
The transceiver opening and a sas connector I do not think can be confused.
Top Expert 2014

Commented:
My bad, they are FC/Ethernet, might be set to the wrong protocol though.
Distinguished Expert 2017
Commented:
Right
If not mistake, iscsi 10GB are network and should work with the microtik provided they transceivers are of the same type and the optical cable is of the right type.

If your controllers so the 12gb,16gb FC type controller, then you have an equipment mismatch
You would need an FC switch and an FC hba to connect systems to the San.or connect the limited set of systems directly to the SAn
At which you will be limited to hosts connecting directly to the San.
Top Expert 2014
Commented:
MikroTik 5-Port Desktop Switch implies you have three or fewer hosts, not that it will help with finding SFP+ cables but you really don't need a switch since you can direct-attach up to 4 hosts. Note also the rather strange statement there "The Dell EMC PowerVault ME4 Series storage system supports only software iSCSI adapters. " Also they only support passive DAC cables.

https://www.dell.com/support/manuals/uk/en/ukbsdt1/powervault-me4024/me4_series_dg_pub/iscsi-host-server-configuration-for-windows-server?guid=guid-da96d36d-7905-4a4a-bc5e-11fb102baa8e&lang=en-us

DAC cables are listed at https://www.dell.com/support/manuals/uk/en/ukbsdt1/powervault-me4084/me4_series_sm_pub/supported-sas-and-twinax-direct-attach-cables?guid=guid-775a3b33-41c4-42e6-805b-c82ab8a09c3e&lang=en-us



Can you show a screenshot of the error pls.

Author

Commented:
Andy - thanks much, makes sense - I think I'll remove the switch and direct connect the server NIC(s) to the SAN ME2024 controllers (didn't think I could do that)...
Me 4024 Host Server Configuration (Andy linked)

Arnold - Yes 10Gb, not 12. It looks like this may work for direct connect:
SFP+ 10GbE Copper Twinax Direct Cable

If that doesn't work, I'll look at the fiber transceivers you pointed out:
10Gb iSCSI SFP+ Optical Adapter
Top Expert 2014

Commented:
I think generic cables will work; there is a ROM in each SFP that hold the transceiver specs including manufacturer name and serial no but I don't think Dell ME4s check that it's Dell branded before enabling the port.

Not sure of the IP address scheme to use with direct attached iSCSI, each cable is isolated from the others so a subnet for each is what I would try first.

Author

Commented:
Got it, thank you.

I'll have the cables tomorrow and see what happens. I ended up getting these earlier in case of the Dell thing you mentioned above.
Dell Networking, Cable, SFP+ to SFP+, 10GbE, Copper Twinax Direct Attach Cable, 1 Meter - 470-AAGN

Author

Commented:
Thanks guys. I ended up using the cables and switch below. Just had to switch the ports on the ME4 to iSCSI in the settings page. They work either direct connect PE730<>ME4, or through the switch.

Cables:


Switch:

Author

Commented:
Guess they didn't like the links:

Switch:
MikroTik 5-Port Desktop Switch, 1 Gigabit Ethernet Port, 4 SFP+ 10Gbps Ports (CRS305-1G-4S+IN)

Cables:
Dell Networking, Cable, SFP+ To SFP+, 10GbE, Copper Twinax Direct Attach Cable, 1 Meter - 470-AAGN
Top Expert 2014

Commented:
You gave up on a switchless configuration with point-to-point cabling? That's so sad, If Dell marketing list it as an option then their support ought to be able to tell you how to configure it. It's why I prefer SAS host connect for small clusters since that is always switchless.

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