Below are the different categories of enterprise SSDs Dell offers: Hard Disk Drives for Dell Enterprise server and storage products are available in several different types, including Mission Critical (10K & 15K) Performance Optimized, Business Critical (7.2K) Capacity Optimized.
Generally speaking, the Mission Critical (MC) or Performance Optimized drives (10K and 15K SAS) are used in those applications requiring the highest reliability and performance and are only available in 2.5” small form factor.
Dell puts its enterprise hard drive (HDD) and solid state drive (SSD) offerings through a rigorous validation process before they are ever considered as additions to Power Edge server portfolio.
Only the very best drives that can meet exact specifications for performance, duty cycles, Mean Time Between Failure (MTBF) and HDD rotational vibration necessary for an enterprise-level environment are accepted for customer usage.
Enterprise SSDs as a class are unique against client or consumer-based SSD in terms of reliability, performance and architecture.
While consumer-based SSDs, such as those utilized in notebooks are designed with a focus on consumer-based workloads, rigidity and battery life, enterprise-class SSDs are designed around enterprise application I/O (input/output) requirements with random I/O performance, reliability and protection of data during a sudden power-down.
Over-provisioning: The Achilles' heel of SSDs are their write characteristics.
This practice keeps native Flash capacity beyond the user-defined capacity, and utilizes the additional space as a scratch pad of sorts to quickly put down application write data on areas of Flash that are already in an erased state.
The SSDs perform cleanup functions of this over-provisioned Flash space during time periods typically not impacting application performance.