In optical-storage technology, a laser beam encodes digital data onto an optical, or laser, disk in the form of tiny pits arranged in a spiral track on the disk’s surface. A laser assembly reads the spinning disc, converting lands and pits into sequences of electric signals.

An optical disk is any computer disk that uses optical storage techniques and technology to read and write data. It is a computer storage disk that stores data digitally and uses laser beams (transmitted from a laser head mounted on an optical disk drive) to read and write data.

Optical drives, that can read and write CDs, DVDs, and sometimes Blu-ray discs, have been an important part of the PC universe for a long time. But there’s less and less need for them. Most users download and stream music and movies these days rather than buy them on a shiny five-inch disc.

An optical disk is any computer disk that uses optical storage techniques and technology to read and write data. It is a storage device in which optical (light) energy is used. It is a computer storage disk that stores data digitally and uses laser beams to read and write data.

Some common types of optical drives include CD-ROM, CD-RW, DVD-ROM, DVD-RW, and Blu-ray drives. CD and DVD writers, such as CD-R and DVD-R drives use a laser to both read and write data on the discs.

There are three main types of optical media: CD, DVD, and Blu-ray disc.

Storage devices

The Pros and Cons of SSD

• SSD is faster. Much faster.
• SSD can take a licking. The entire lack of moving parts in a solid state drive means that it can withstand impacts far better than its much more fragile cousin, the hard disk drive.
• HDD is cheaper; SSD is still expensive.
• HDD has greater storage capacity.

Efficiency and reliability The solid state drive uses flash memory to store data, which provides a better reliability and efficacy over hard disk drives. Moreover, since SSDs don’t have any moving parts, they use less power to function. Respectively, users can benefit from longer battery life for their laptops.

SSD – The SSD has no moving parts. The SSD uses flash memory to store data, which provides better performance and reliability over an HDD. HDD – The HDD has moving parts and magnetic platters, meaning the more use they get, the faster they wear down and fail.

7 Benefits to SSD Upgrades

• Cooler. SSDs do not have moving parts so they don’t generate heat like an HDD would.
• Quieter. The lack of moving parts also lends itself to a quieter computer.
• Last longer.
• Faster.
• Tougher.
• Not affected by magnets.
• Use less power.

Like memory stick storage, there are no moving parts to an SSD. Conversely, a hard disk drive uses a mechanical arm with a read/write head to move around and read information from the right location on a storage platter. This difference is what makes SSD speed so much faster.