To manage disks, go to Storage and click Disks on the top right of the screen to open the Disks screen.

To view details on a disk, click on the disk to expand it. Select Edit to open the Edit Disk screen.

The Disks screen lets users edit disks or delete obsolete data off an unused disk.

• Replacing Disks: Provides disk replacement instructions that take a failed disk offline and replaces a disk in an existing VDEV. The replacement process automatically triggers a pool resilvers.
  
  
• Wiping a Disk: Provides instructions for wiping a disk.
  
  
• SLOG Over-Provisioning: Provides information on the disk_resize command in TrueNAS.
  
  
• Managing Self-Encrypting Drives (SED): Covers self-encrypting drives including supported specifications, implementing and managing SEDs in TrueNAS, and managing SED passwords and data.
  
  

The Disks screen lists the physical drives (disks) installed in the system. The list includes the names, serial numbers, sizes, and pools for each system disk.

Use the Columns dropdown list to select options to customize disk the information displayed. Options are Select All, Name, Serial (the disk serial number), Disk Size, Pool (where the disk is in use), Disk Type, Description, Model, Transfer Mode, Rotation Rate (RPM), HDD Standby, Adv. Power Management, and Reset to Defaults. Each option displays the information you enter in the Edit Disk screen or when you install the disk.

The VDEVs screen lists VDEVS and disks configured for the selected pool. Go to Storage and click on View VDEVs on the VDEVs widget to view the VDEVs screen.

Click anywhere on the VDEV to see the drives in it and the ZFS Info widget for that VDEV.

Click anywhere on a drive to see the drive widgets.

There is a special consideration when installing TrueNAS in a Virtual Machine (VM), as S.M.A.R.T services monitor actual physical devices, which are abstracted in a VM. After the installation of TrueNAS completes on the VM, go to System > Services and click the blue toggle on the S.M.A.R.T. service to stop the service from running. Clear the Start Automatically checkbox so the service does not automatically start when the system restarts.

Note that the table(s) below can be reorganized by clicking on the column titles. This allows you to reorganize the information in each column by togglnig between a descending and ascending order.

The Services > S.M.A.R.T. screen displays settings to configure when S.M.A.R.T. tests run and when to trigger alert warnings and send emails.

Click Save after changing any settings.