Skip to main content
Sign Out

Welcome to Dell

My Account
  • Place orders quickly and easily
  • View orders and track your shipping status
  • Create and access a list of your products
  • Manage your Dell EMC sites, products, and product-level contacts using Company Administration.
Sign In Create an Account Premier Sign In Partner Program Sign In
Contact Us

Article Number: 000144064

Precision 5820 Tower, Precision 7820 Tower, Precision 7920 Tower NVMe Drives Do Not Work in Legacy Mode

Summary: The NVMe Drives do not work in Legacy Mode on the Precision 5820 Tower, Precision 7820 Tower, and Precision 7920 Tower.

This article may have been automatically translated. If you have any feedback regarding its quality, please let us know using the form at the bottom of this page.

Article Content

Symptoms

NVMe Drives disappear or do not work when in Legacy Mode.

Affected Platforms

  • Precision 5820 Tower
  • Precision 7820 Tower
  • Precision 7920 Tower

Cause

The Intel Volume Management Device (VMD) Technology (also known as Intel® Virtual RAID on CPU or vROC) does not support Legacy Mode. These drives will only show up attached to the controller when in UEFI Mode.

Resolution

Go into BIOS and disable the VMD controllers so that the platform uses the native NVMe controllers and NVMe Drivers on the operating system.

  1. Boot into BIOS setup
  2. Navigate to System Configuration an Intel VMD Technology and change the computer from Auto to Disabled and clear all the PCIE boxes on the same page (Figure 1).
    System Configuration

    Figure 1: System Configuration

  3. Click apply, OK, and then Exit.

Hot plug would no longer be supported on these drives when used in this mode.

Article Properties

Affected Product

Precision 5820 Tower, Precision 7820 Tower, Precision 7920 Tower

Last Published Date

02 Oct 2023

Version

6

Article Type

Solution

Back to Top