Electrical consumption of a hard disk

[hilltina]

Good morning all
 
I will create a NAS from a server.
There should be 10 or 15 disk in it.
 
as I must sizer at best and it is a machine that will turn 24/24 (with the cons that goes with) I must know if the current power supply is sufficient.
 
so my question is this
on average how much can we estimate the consumption of a disk
3.5 "
2.5 "mechanical
2.5 "SSD
 
thanks in advance

[Nic_Brough__Adaptavist_]

This does not really have anything to do with Confluence, you would be better off asking in hardware fora.

But, as it's something I've looked at before:

You'll find most hard drives consume between 15W and 30W when highly active.  So your NAS should have a supply capable of delivering 450W (15 disks at 30W each).

If you swap to SSDs, they need a lot less, I don't think I've seen one that needs more than 2W while heavily loaded.