What is the difference between magnetic storage and optical storage?

Magnetic Storage

Magnetic Storage Devices

Magnetic-Storage-Devices-Revision-Sheet

What is the difference between magnetic storage and optical storage?

Magnetic HDD With spinning platter in view

These are the oldest of the commonly used storage devices, but are still the most widely used.

  • Magnetic Hard Drives are used to store data and programs on desktops and laptops
  • Magnetic tape drives are usually used for large server / systems backups.

Advantages

  • Cheap Storage per MB (especially tape drives!)
  • Relatively quick read / write speeds.

Disadvantages

  • Easily broken if dropped
  • Slow read /write compared to new SSD drives.
  • High energy uses as it uses moving parts (lower battery life on laptops)

Further Watching  – How do Magnetic Stripe Cards work?

Optical Storage

Optical Storage Devices

Optical-Storage-Devices-Revision-Sheet

Optical Storages used to be incredibly popular up until the last couple of years where cloud storage and the rise of video and game streaming services have massively reduced their popularity.

Types of optical storage devices:

  • CD Drives  (700MB)
  • DVD Drives  (4.7GB)
  • BluRay Drives (50GB)

Optical storage devices offer cheap and portable high capacity secondary storage. Far more portable than an internal hard-drive, which makes them good for small / medium size backups and great for sending through the post.

How they work

Optical storage devices work by firing a laser at the surface of a spinning disk. The disc is covered in a pattern of pits in the CD surface. As the laser hits the pits it is reflected and the pattern of pits it detected by a laser detector.

Solid State Storage

Solid State Storage Devices

What is the difference between magnetic storage and optical storage?

SSD Drive – Expensive but fast

Solid-State-Devices-Revision-Sheet

Solid state devices are the newest form of storage to emerge. The technology is used in Hard Drives, SD Cards and USB sticks. Solid state storage devices work by storing data in flash chips electronically. They are still more expensive than traditional storage devices but the price per GB is falling all the time.

Advantages

  • Very fast read / write speeds.
  • Shock resistant as there are no moving parts to break if knocked
  • No moving parts so longer battery life ( great for laptops / tablets / smartphones)

Disadvantages

  • More expensive per GB of storage
  • Limited life span, as each flash cell can only be written to a limited number of times.

What is the difference between magnetic storage and optical storage?

What is the difference between magnetic storage and optical storage?

Very portable and small – but needs a reader to use

Characteristics

Common Storage Device Comparisons

Device Type Capacity Speed Portability Durability Reliability Cost
Magnetic Hard Drive HDD High Capacity(2TB +) Relatively Slow Read / Write Speeds Not very portable and quite heavy Long life span, but susceptible to damage / data corruption if dropped Very Reliable Cheapest form of main secondary storage
Solid State Hard Drive Medium Capacity <1TB Exceptionally fast read / write speeds More portable than HDD but not as portable as other types, as usually inside the pc No moving parts, so very durable Quite reliable, up to 5 years. Twice the price of HDD Drives
SD Card Low / Medium Capacity <256GB Very fast read / write, as flash memory Extremely portable Won’t be damaged if dropped, but easy to lose and susceptible to water damage Not very reliable, prone to stop working over time Quite high cost per GB
Pen Drive Low / Medium Capacity <256GB Very fast read / write, as flash memory Extremely portable Won’t be damaged if dropped, but easy to lose and susceptible to water damage Not very reliable, prone to stop working over time Quite high cost per GB
CD (Optical Drive) Low Capacity 700MB Very Slow Read / Write speed quite portable, cheap to mail, will work in many devices (PCs, Music Players, Car stereos) Easy to scratch and data loss easy Not very reliable, prone to stop working over time Very Low cost per unit(10p)
DVD Low Capacity 4.7GB Quite Slow Read / Write Speed quite portable, cheap to mail Easy to scratch and data loss easy Not very reliable, prone to stop working over time Very Low cost per unit (10p)
Blu-ray Medium Capacity 50GB+ Medium Read write speed quite portable, cheap to mail Easy to scratch and data loss easy Not very reliable, prone to stop working over time Very Low cost per unitl (10p)
Magnetic Tape Drive Massive Capacity Very Slow Read / Write speed. Sequential read / write only quite portable, cheap to mail Generally long lasting Medium reliability over time Very, very low cost per TB
Cloud Storage Effectively infinite storage Depends on internet speed, but quite slow Can access anywhere there is access to internet Very durable, due to backups and offsite storage. As reliable as internet connection. Cheap per GB, but may require monthly subscription

Resources

What is difference between magnetic and optical storage device?

A magnetic disk is a storage device that uses a magnetization process to read, write, rewrite and access data. The Magnetic disk is made of a set of circular platters. ... Difference Between Magnetic Disk and Optical Disk:.

Why are optical storage media considered better than magnetic storage media?

Optical storage provides greater memory capacity than magnetic storage because laser beams can be controlled and focused much more precisely than can tiny magnetic heads, thereby enabling the condensation of data into a much smaller space.

Which one is the magnetic and optical memory?

Optical Storage Devices: Optical storage devices are flat, round disks which spins around its center. The difference with magnetic storage devices is that in optical storage devices LASER light is used to read and write data in disks. Examples are CD, DVD etc.

What is a magnetic storage device?

A magnetic disk is a storage device that uses a magnetization process to write, rewrite and access data. It is covered with a magnetic coating and stores data in the form of tracks, spots and sectors. Hard disks, zip disks and floppy disks are common examples of magnetic disks.