# SSD

SSD are Disk objects of type SSD.

## Characteristics

Name Unit Default value Description Example
units None 1 SSD quantity 2
usage None See Usage See usage ..
type None SSD "SSD" SSD
capacity Go 1000 Capacity of a ssd disk 500
density cm2/Go 48.5 cm2 per Go on a ssd wafer 48.5
manufacturer None None Name of the CPU manufacturer Samsung
model None None .. ..

## Complete

The following variables can be completed

### density

if manufacturer is given, density can be retrieved from a fuzzy matching on our ssd repository.

## Manufacture impact

For one SSD the manufacture impact is:

$\text{SSD}_\text{manufacture}^\text{criteria} = (\text{SSD}_{\text{capacity}} / \text{SSD}_{\text{density}}) * \text{SSD}_\text{manufacture_die}^\text{criteria} + \text{SSD}_\text{manufacture_base}^\text{criteria}$

with:

Constant Units Value
$$\text{SSD}_\text{manufacture_die}^\text{gwp}$$ kgCO2eq/cm2 2.20
$$\text{SSD}_\text{manufacture_die}^\text{adp}$$ kgSbeq/cm2 6.30E-05
$$\text{SSD}_\text{manufacture_die}^\text{pe}$$ MJ/cm2 27.30
$$\text{SSD}_\text{manufacture_base}^\text{gwp}$$ kgCO2eq 6.34
$$\text{SSD}_\text{manufacture_base}^\text{adp}$$ kgSbeq 5.63E-04
$$\text{SSD}_\text{manufacture_base}^\text{pe}$$ MJ 76.90

Note: If there are more than 1 SDD we multiply $$\text{SSD}_\text{manufacture}^\text{criteria}$$ by the number of SSD given in units.

## Usage impact

Only power consumption is implemented.