Dell OpenManage Server Administrator Version 7.4 Command Line Interface Guide

Description	Enables write cache on a physical disk for the PCIe SSD controller.
Syntax	`omconfig storage pdisk action=enabledevicewritecache controller=id pdisk=< PDISKID>`, where id is the controller ID. The <PDISKID> variable specifies the physical disk. NOTE: To obtain these values, type omreport storage controller to display the controller IDs and then type omreport storage pdisk controller=ID to display the IDs for the physical disks attached to the controller.
Example to	Enable write cache on physical disk 3 on connector 0 of controller 1. On a SAS controller, the physical disk resides in enclosure 2.
Example for SAS controllers	`omconfig storage pdisk action=enabledevicewritecache controller=1 pdisk=0:2:3`

Omconfig Enable Device Write Cache