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Table des matières
HDD
Introduction
Definition
- Liste à puceHDD = Hard Disk Drive
- Storage device that uses magnetic storage to save, store and retrieve data
What is it used for?
- Save, store and retrieve data
- It is permanent storage, unlike volatile memory like RAM.
- Can be used in desktops, laptops, servers or for external storage.
Are they different types and technologies?
Interface:
- SATA = Serial ATA
- PATA = Parallel ATA
- SCSI = Small Computer System Interface
Form factor:
- 2.5 inch
- 3.4 inch
Manufacturing and processes
What is it made of?
An HDD is composed of the following elements:
Platters:
- One or more
- Double-sided
- Glass substrates, coated with magnetic material
- They are spinning, thanks to the motor.
Motor:
- Spindle with motor
Read-write heads:
- Positioned by actuators
- It is flying 3 nm above the disk surface
Supporting electronics
How is it manufactured?
TBC
Who are the main manufacturers?
3 main manufacturers:
- Seagate
- Western Digital
- Toshiba
Where are they located?
TBC
Environmental footprint
What are the main environmental impacts associated to the materials?
Materials used:
- Aluminium, copper, steel
- “rare earth” (for magnet)
What are the main environmental impacts associated to the manufacturing processes?
TBC
What are the potential parameters affecting environmental impact?
TBC
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