HOW DO HARD DRIVE WORK
Hard drive:
Permanently stores and retrieves data on computer.
Non volatile memory.
Consists of one or more platters to which data is written using a magnetic head.
Platter:
One or more aluminum glass that is coated on magnetic media located within drive for storing data permanently.
When computer started, the platters will began to rotate.
How many platters on hard drive?
Depends on physical size, and capacity, how many sectors and its manufacturer.
Sector:
Area that is different from others.
When was Hard drive invented?
IBM 350 disk file was developed under the code name RAMAC.
RAMAC:
Random access method of accounting and control.
Very large in size.
Why they are called Hard drive?
Usually made from metal.
Internal Hard drive:
Located inside computer.
External Hard drive:
Extra storage can be added by USB.
Types of Hard drive:
HDD.
SSD.
HDD:
Hard disk drive.
Bunch of magnetic disks spinning very fast, with head reading and writing data.
Larger and cheaper but also slower.
Head has to re-position itself every time you need data from different location.
SSD:
Solid state driver.
No moving mechanical components.
Array of semiconductor memory organized as disk drive, using integrated circuits rather than magnetic or optical storage media.
Uses a type of memory called "flash memory" similar to RAM.
But it does not lose data when power loses.
Types of Connector for Hard drive:
SATA.
PCIe.
SATA:
Serial advanced technology attachment.
Minimum of four wires creates point to point connection between devices.
Connects adapters and devices via high speed.
PCIe:
Peripheral component interconnect express.
Connecting computer to one or more peripheral devices.
Quite expensive.
What is stored in Hard drive?
Store any data including picture, music, videos, text or any downloaded software OS.
Parts of Hard drive:
Platter.
Motor.
Head arm.
Actuator.
Jumper.
Platter:
Non magnetic material aluminum, glass and coated with magnetic material.
Data stored digitally in the magnetic region on platter.
Two polarities: N-S, S-N.
N-S represent 1.
S-N represent 0.
Motor:
Rotates on its own axis.
It can magnetize and demagnetize head for reading and writing.
Head:
Used to read and write data on platter.
Actuator:
Head is attached to actuator.
Electronic device controlled by motor that moves the head arm.
Jumper:
Allowing electricity to flow certain sections of board.
Advantages:
Large storage capacity.
Stored items are not lost when computer is switched off.
Disadvantage:
When crashes data will be lost.
Permanently stores and retrieves data on computer.
Non volatile memory.
Consists of one or more platters to which data is written using a magnetic head.
Platter:
One or more aluminum glass that is coated on magnetic media located within drive for storing data permanently.
When computer started, the platters will began to rotate.
How many platters on hard drive?
Depends on physical size, and capacity, how many sectors and its manufacturer.
Sector:
Area that is different from others.
When was Hard drive invented?
IBM 350 disk file was developed under the code name RAMAC.
RAMAC:
Random access method of accounting and control.
Very large in size.
Why they are called Hard drive?
Usually made from metal.
Internal Hard drive:
Located inside computer.
External Hard drive:
Extra storage can be added by USB.
Types of Hard drive:
HDD.
SSD.
HDD:
Hard disk drive.
Bunch of magnetic disks spinning very fast, with head reading and writing data.
Larger and cheaper but also slower.
Head has to re-position itself every time you need data from different location.
SSD:
Solid state driver.
No moving mechanical components.
Array of semiconductor memory organized as disk drive, using integrated circuits rather than magnetic or optical storage media.
Uses a type of memory called "flash memory" similar to RAM.
But it does not lose data when power loses.
Types of Connector for Hard drive:
SATA.
PCIe.
SATA:
Serial advanced technology attachment.
Minimum of four wires creates point to point connection between devices.
Connects adapters and devices via high speed.
PCIe:
Peripheral component interconnect express.
Connecting computer to one or more peripheral devices.
Quite expensive.
What is stored in Hard drive?
Store any data including picture, music, videos, text or any downloaded software OS.
Parts of Hard drive:
Platter.
Motor.
Head arm.
Actuator.
Jumper.
Platter:
Non magnetic material aluminum, glass and coated with magnetic material.
Data stored digitally in the magnetic region on platter.
Two polarities: N-S, S-N.
N-S represent 1.
S-N represent 0.
Motor:
Rotates on its own axis.
It can magnetize and demagnetize head for reading and writing.
Head:
Used to read and write data on platter.
Actuator:
Head is attached to actuator.
Electronic device controlled by motor that moves the head arm.
Jumper:
Allowing electricity to flow certain sections of board.
Advantages:
Large storage capacity.
Stored items are not lost when computer is switched off.
Disadvantage:
When crashes data will be lost.