Knowledge about HDD - SSD and how to choose suitable for use purposes - AnonyViet

Today Anonyviet will bring you a knowledge that is far and near. You still use it every day without understanding it. It is the secondary memory of the computer (Hard Drive). So what do you know about it, choose the right one for you? Let’s study together.

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Classification of hard drives

Hard drives are currently divided into two types

HDD (Hard Disk Drive)
SSD (Solid State Drive)
Hybrid HD (Combine two SSDs and HDD into 1)

HDD hard drive explanation

HDD is secondary memory of the computer

Collection of multiple recording discs stacked but no touching together. These recordings are called platter

Data is read by an instrument called word head read, write (The lever touches the disc)

Description picture

HDD drive — The read-write head is in contact with the platter to read and write data (Illustration image)

HDD Platter System — HDD’s multiple-disk stacked but non-contact recording system

Hard Disk Drive — A fully structured HDD

How to store data

Data is saved and retrieved from disk in blocks. Data blocks are stored in sectors, sectors are of fixed or variable length.

When you access data, the HDD will spin the disc and find the saved area, then retrieve the necessary data for you. The faster you spin, the higher the temperature

Knowledge about HDD - SSD hard drive and how to choose suitable for use purpose 5 — Illustration of Sector on HDD recording disk

One storage unit includes many sectors (from 2 sectors or more) is called cluster. When you archive, the data will be saved in dozens or hundreds of clusters.

Knowledge of HDD - SSD and how to choose suitable for use 6 — Many sectors will be called clusters – In the picture is a cluster containing 3 sectors

Advantage

Includes many recording discs, so the storage capacity is large and 4TB at most ( ~ 4000 GB – For users ), (14TB for supercomputers)
The price is cheap and there are many types with different rotation speeds.

Defect

Very vulnerable physics For Laptop (Hard impact will disk crash and cannot be repaired)
Because the disc is rotated at high speed, there will be temperature (Hurry to get hot when accessing)
Difficult to maintain and difficult to repair
Electrical Power big consumption

SSD hard drive explanation

Is secondary memory like HDD but has a more special structure with electronic chips. Developed to compete with HDD

From Multiple Memory Chips Non-volatile memory chips (Memory chip remains unchanged)

Build SSD hard drive — Structure of many memory chips (Black)

How to store data

SSD stores data in Flash chip fast. So when you access data, the flash chip immediately responds so data access happens immediately. No need to waste time spinning discs like HDD.

Advantage

Data access Super fast (takes place instantaneously thanks to flash chip)
Error correcting code (ECC) function – self-detection and patching
Functions to enhance performance thanks to command TRIM
Consume Electrical Power little
Temperature born not tall
Less hurt physics and data is safe in the memory chips

Defect

Price high city
Not compatible with some computers
Hard to repair
Chip is limited, so it can’t store as much as HDD (Up to 512 GB – For users), (16TB for supercomputers)

Choose suitable for the purpose of use

You can see HDD Have large storage capacity and SSD Have fast access speed.

Select HDD – if you are a user who needs to store a lot of data and need a lot of space for the drive to install heavy games such as GtaV, Watch Dog, Call Of Duty, … and graphics products with huge sizes.

Choose SSD – if you are a user who needs to transfer, retrieve, share, copy data quickly.