This is not as straight forward as it sounds.
Specs from Western Digital's site for a WD 3TB Green Drive:
- Read/Write 6.00 Watts
- Idle 5.50 Watts
Looks fine right? Look at this part of the spec: "12 VDC" and "Read/Write 1.78 A".
It was a long time ago, but when I was in college that would mean the drive uses 21.36 Watts (12V x 1.78A). 21.36 Watts is a lot more than the claimed 6.00 Watts.
I want to put four of these in a RAID 10 array, so I want to know the actual max power requirement.
Thoughts? Is this a simple typo? Do I need to plan on ~85 Watts of power to support four drives?