No, we need at least 2 hard disks.

One is for system partition and another is for data partition.

From: 周擎阳 <18245043314@163.com>
Date: Wednesday, April 22, 2020 at 3:34 PM
To: "starlingx-discuss@lists.starlingx.io" <starlingx-discuss@lists.starlingx.io>
Subject: [Starlingx-discuss] can one huge disk work?

Dear sir:

In the installing guide "https://docs.starlingx.io/deploy_install_guides/r3_release/bare_metal/aio_simplex_hardware.html", I find stx need a least 2 disks, but now that I have only one disk with 5TB, can I install stx on that single disk?