💾SSD

NEW

Also known as: Solid-State Drive

A non-volatile storage device using flash memory to deliver fast data access, low latency, and improved durability.

DESCRIPTION

Solid-state drives store data on integrated circuits, typically NAND flash, avoiding moving parts found in HDDs. SSDs offer faster I/O, lower latency, and higher shock resistance, with interfaces like SATA and NVMe. They enable performance gains in databases, analytics, and virtualized environments. Consider endurance (TBW), wear leveling, and TRIM for longevity. NVMe SSDs further reduce protocol overhead via PCIe. Costs per GB are higher than HDDs but continue to drop.

ALTERNATIVE DEFINITIONS

Wikipedia

A solid-state drive (SSD) is a solid-state storage device that uses integrated circuit assemblies to store data persistently, typically using flash memory.

Highlights integrated circuits and persistent flash-based storage.

Source

Crucial

An SSD, or solid-state drive, is a storage device that uses nonvolatile memory to hold and access data.

Defines SSD via nonvolatile memory and storage function.

Source

RELATED TERMS

NVMe SATA IOPS Delays RAID Wear Leveling TRIM Flash Memory Block Storage

COMPETING TERMS

Hard Disk Drive

KNOWLEDGE AREAS

Infrastructure Data Storage & Operations

TARGET AUDIENCE

Hardware Engineer Cloud Architect DevOps Engineer Data Engineer IT Manager

EXTERNAL SOURCES

• Wikipedia - Solid-state drive
• NVM Express, Inc. - NVMe standard overview
• Intel - SSD basics and performance
• Samsung - SSD 101 educational guide

TOP QUESTIONS

How do SSDs differ from HDDs?

SSDs use flash memory with no moving parts, providing faster access and lower latency than mechanical HDDs.

Category: Comparison

What is NVMe and why does it matter for SSDs?

NVMe is a protocol optimized for PCIe-connected SSDs, reducing overhead and enabling high IOPS and low latency.

Category: Concepts

What affects SSD endurance?

Write amplification, NAND type, wear leveling, and TRIM support influence endurance, typically measured by TBW.

Category: Requirements

What are common SSD mistakes?

Ignoring firmware updates, misconfiguring alignment, and filling drives to 100% capacity can degrade performance and lifespan.

Category: Mistakes

Are SSDs suitable for databases?

Yes, SSDs significantly improve transactional and analytical performance due to faster random I/O and lower latency.

Category: Use Cases

What risks exist with SSDs?

Write-heavy workloads may stress endurance; sudden power loss without protection can risk data integrity.

Category: Risks

How to choose between SATA and NVMe SSDs?

NVMe delivers higher throughput and lower latency; SATA is cheaper and adequate for less demanding workloads.

Category: Comparison

How does TRIM help SSDs?

TRIM informs the SSD about unused blocks, improving write performance and reducing write amplification.

Category: Concepts

What is a hot topic in SSD technology?

Advances in QLC NAND and computational storage expand capacity and offload processing from the CPU.

Category: Topic