Seen when testing Bug 1567684. Spurious changes are see in the activity log when running a hardware scan. Disk:model Added None Disk:phys_sector_size Added 512 Disk:sector_size Added 512 Disk:size Added 21474836480 Disk:model Removed Disk:phys_sector_size Removed 512 Disk:sector_size Removed 512 Disk:size Removed 21474836480 On the hardware details page the disk model is blank. (IE: 'None') I think that no activity should have been recorded in this instance.