`fwupdmgr' on a non-UEFI computer

I have an Intel 160GB SSD in my old (non-uefi) laptop, and thought I should update the firmware. Last time I did it, I put it on a stick and the fw comes on a bootalbe small linux build.

Thought I should try out the fwupdmgr this time. I ran the check, and got a “warning”. Not sure how I should read that one.

Output
$ fwupdmgr get-devices
WARNING: UEFI firmware can not be updated in legacy BIOS mode
  See https://github.com/fwupd/fwupd/wiki/PluginFlag:legacy-bios for more information.
Amilo Si 1520
│
└─SSDSA2M160G2GC:
      Device ID:          [ ... ]
      Summary:            ATA drive
      Current version:    02M3
      Vendor:             Intel (ATA:0x8086, OUI:001517)
      GUIDs:              [ ... ]
      Device Flags:       • Internal device
                          • Updatable
                          • System requires external power source
                          • Needs a reboot after installation
                          • Device is usable for the duration of the update

That linked page suggests I add: DisabledPlugins=test;invalid;bios to the prefs, and that the warning can be ignored, and then there was an additional warning.

Not sure how I’ll read that. Can I use it, or can’t. It’s ok if I can’t, and I’ll just do it like last time, but it would be nice if it did.

Anyone having experience with fwupdmgr, on a non-uefi system?