Storage and core infrastructure (1)

What is the meaning of word (HDD)

Hard Disk Drive (HDD)

What is the Hard Disk Drive (HDD)

The HDD is an entirely mechanical device

It consists of spinning magnetic Platters and a Read/Write Head that moves mechanically to access data

Speed is measured in RPM

This mechanical process makes data access slow

What is the meaning of word RPM

(Revolutions Per Minute).

Technician's of HDD Concerns

Slowness and Random Access,

Fragmentation,

Vulnerability.

What is the meaning of word SSD

Solid State Drive

What is the ssd

The SSD has absolutely no moving parts.

It consists of flash memory chips using advanced technology.

It operates purely electronically.

What is the type of ssd

SATA SSD

,

NVMe

.

What is the sata ssd

This type uses the SATA 3.0 cable and port, whose maximum speed is limited to 6 Gbps (around 550 MB/s read/write). This is a vast improvement over HDD, but it is not the full potential speed of an SSD.

What is the meaning of word NVMe

(Non-Volatile Memory Express)

What is the NVMe

uses the PCIe lanes (the same lanes used by the graphics card) instead of SATA. PCIe is tens of times faster. 7000 MB/s in modern generations (PCIe Gen 4).

What is the core advantages of ssd

Speed,

Durability (Not susceptible to shock or vibration because there are no moving parts.).

Maintenance of ssd

Maintenance: It does not require Defragmentation, but it relies on the TRIM command in the OS to maintain its high performance.