page_test
Table des matières
HDD
System definition
- HDD = 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
Life cycle
Manufacturing
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
Next steps
What do we know we don't know?
TBC
What are the identified challenges?
TBC
What paths/ideas should be explored?
TBC
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