Hard Disk

A hard disk drive (HDD) is a data storage device that uses magnetic storage to store and retrieve digital information. It consists of one or more rotating disks coated with magnetic material. HDDs are commonly used in computers and servers for data storage, offering high capacity and cost-effectiveness, though they are slower than solid-state drives (SSDs).

Types :

Internal HDD:

Installed inside a computer or server, used for primary storage.

External HDD

Portable drives connected via USB or other interfaces, used for backups or additional storage.

SATA HDD

Uses Serial ATA interface, common in consumer devices for its speed and affordability.

SAS HDD

Serial Attached SCSI drives, designed for enterprise use, offering higher performance and reliability.

SSD (Solid State Drive)

While not an HDD, it's worth noting as a newer alternative that uses flash memory for faster data access.

Hybrid HDD (SSHD)

Combines HDD and SSD technology, using a small amount of flash memory for improved performance while maintaining larger HDD storage capacity.

Storage Capacities

• 500 GB: Suitable for basic storage needs, like documents and photos.
• 1 TB (Terabyte): Common for standard usage, including games and media files.
• 2 TB Ideal for users with extensive media libraries or gaming data.
• 4 TB Typically used for backups and large collections of data.
• 8 TB and above Common in enterprise settings for extensive storage needs, such as servers and data centers.

Numerical Cables

SATA Cables

SATA III: Up to 6 Gbps, used for connecting internal HDDs to motherboards.

USB Cables:

• USB 2.0: Up to 480 Mbps, commonly used for external HDDs.
• USB 3.0 Up to 5 Gbps, provides faster data transfer for external drives.
• USB-C : Supports higher speeds and reversible connections, used in modern external HDDs..

SAS Cables

SAS (Serial Attached SCSI): Supports multiple devices with data transfer speeds of up to 12 Gbps.