This can't be true. Different models will not require the same amount of power. Maybe that's the value for the most power-hungry models in the last generation of Barracudas and Deskstars.
I realize that these 3.5" drives aren't really low power, but they do seem to be representative of what is available.
Seagate 3.5 drives are all Barracudas (desktop) or Constellation ES (server). The latest gen Barracuda specifies 2A spin up (manual
) and the Constellation 2.05A (manual
The "low power" 5400RPM Deskstar 5K3000 specifies 2.0A as well (datasheet
Samsung drives seemed to have ceased to exist since Seagate makes them now but the Spinpoint needs 2.2A (manual
There do not seem to be that many options in the 3.5 consumer SATA drives market. It's WD, Seagate or Hitachi. And they all draw above 1A on spin up.
Since 2.5" drives only draw on the 5V line, and the motherboards are rated 2.5A on that it makes me wonder just what they had in mind when they only provided a 1A 12V line.