ThinkSystem SR850 V4/SR860 V4 E3.S 2x2T Backplane Option Kit
See this document for information about the ThinkSystem SR850 V4/SR860 V4 E3.S 2x2T Backplane Option Kit.
This option kit comes with the following components.

1 Two E3.S 2T CMM fillers
2 One E3.S 4x1T/2x2T backplane
3 One E3.S 2T CMM cage
4 Four M3 screws
NOTE
- The illustration in this document might differ slightly from your hardware.
- The four M3 screws are either assembled with the E3.S 2T CMM cage or packed in an independent zipper bag.
Option installation
- To install the option, refer to the applicable user guide:
| Server model | Hardware installation |
|---|---|
| SR850 V4 | Install an E3.S CMM cage and backplane" |
| SR860 V4 | Install an E3.S CMM cage and backplane" |
- For the latest technical information including firmware and driver downloads, go to Lenovo Data Center Support.

| Option installation | |
|---|---|
| To install the option, refer to “Hardware replacement procedures” in the server User Guide, which is available at Lenovo Docs https://pubs.lenovo.com. | |
| For the latest technical information including firmware and driver downloads, go to Lenovo Data Center Support website https://datacentersupport.lenovo.com. | |
First Edition (May 2021)
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