ThinkSystem 36i/48p 12Gb Internal Expander
The ThinkSystem 36i/48p 12Gb Internal expander card, referred to as the expander card, is based on the 12Gb/s SAS, SAS35x48 expander in a custom card form factor.
More information about the adapter is available at the following site:
https://lenovopress.com/servers/options/raid
Installation and User Guide
The Installation and User Guide is available in PDF format: