CompTIA A+ Core 1: Storage Devices

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Define and describe HDD

Hard Disk Drives, are spinning magnetic platters that act as high-capacity, inexpensive, permanent storage
Define and describe SSD

Solid State Drives, are permanent storage devices with no moving parts, they are more expensive than HDDs but are more reliable
What are the most common form factors for HDDs and SSDs?

3.5” and 2.5”, also M.2 for some SSDs
Define and describe AHCI

Advanced Host Controller Interface, is the standard to communicate between non-volatile storage and RAM, it can transmit at 600MBps through SATA 3
Define and describe NVMe

Non-Volatile Memory Express, is the standard to communicate between SSDs and RAM through an M.2 connection, significantly higher transfer speeds to accommodate the SSD
What is an M.2 connection?

A small form factor interface for storage that connects directly to the MOBO, it can achieve 4GBps
True or False: Not all M.2 connections support NVMe

True
Define and describe EEPROM

Electrically Erasable Programmable Read-Only Memory, also known as Flash memory, uses electricity to configure stored data.
What are optical drives?

Relatively slow drives that read data stored on disks in microscopic bumps with a laser
What are 3 examples of optical storage?

CD-ROM, DVD-ROM, and Blu-ray
True or False: As rotational speeds increase in HDDs, latency decreases

True