ML310E gen8 V2 - Four bay LFF drive cage - I see two different models

[vimak]

Good morning, I hope you understand my English, I write from Italy.
I purchased a ML810e Gen8 V2 with 8 SFF drive cage.
I want to buy 4 SFF cage hot-plug drive, I found two different models.

This document       http://h20628.www2.hp.com/km-ext/kmcsdirect/emr_na-c03801789-4.pdf
writes: Four-bay LFF drive cage 686745-001 + LFF hot-plug drive backplane 686746-001

This document https://h20195.www2.hpe.com/v2/getpdf.aspx/c04123183.pdf
writes: HP 4U 4 Large Form Factor Hot Plug Hard Drive Backplane Kit 674839-B21
NOTES: The LFF Kit is a backplane kit designed for NHP LFF to hot-plug LFF.

On ebay I also find this: 686745-002 / 822755-001
Suitable for:

HP ProLiant ML310e Gen8 v2
HP ProLiant ML350e Gen8 V2
HPE Gen9 ProLiant ML30 range

visually the two backplanes differ in the shape of the holes and the exit direction of the pin.

are all compatible? can I mount any one?

Thank you

[FabioC1]

Hi, 

In official document HPE Quickspcs the cage compatible are :

https://h20195.www2.hpe.com/v2/Getdocument.aspx?docname=c04123183

HPE Unique Options HP 4U 4 Large Form Factor Hot Plug Hard Drive Backplane Kit
NOTE: The LFF Kit is a backplane kit designed for going from NHP LFF to hotplug
LFF.
674839-B21

HP 4U 8 Small Form Factor Hot Plug Hard Drive Cage Kit
NOTE: The SFF Kit is the cage plus backplane and designed to convert from any
LFF configuration to SFF.
674841-B21

How wiil to use LFF the kit is 674839-B21 

In this KIt come to this parts : 

http://partsurfer.hpe.com/Search.aspx?SearchText=674839-B21

Cage for this Equipment :

HP ProLiant ML350e Gen8 V2
HPE Gen9 ProLiant ML30 range

Are Not compatible. 

Regards.

[vimak]

I thank you, but your answer does not solve the problem.
I need the cage + backplane, code 674839-B21 is used to transform LFF NHP into a hot-plug
can I put product links on ebay?