This technology was groundbreaking back in the '90s, especially when compared to the ATA interfaces, which used parallel data streams. Out of the seven conductors, three are grounds, while the other four are active data lines arranged in two pairs. The information is transferred through a high-speed serial cable with seven conductors. It delivers data in a serial manner, moving one bit at a time between the drive and its host. SATA, short for Serial Advanced Technology Attachment, is the oldest and most affordable among the three interfaces. NVMe is one of three storage interfaces available today. Understandably, SSDs are more expensive than HDDs, but the disparity in prices is steadily shrinking.Īs a result, it is slowly replacing HDDs in applications where speed, high capacity, durability, and power consumption are essential. It can take the place of hard drive bays, be plugged into a PCI Express expansion slot, or be mounted on a motherboard. With its diminutive size, the SSD gives manufacturers more flexibility when it comes to design. SSDs have higher data transfer rates, lower latency and access times, and higher storage density. These chips are not the same as the ones you see in USB thumb drives. However, it stores data in interconnected flash-memory chips known as NAND instead of in platters. The SSD works under the same basic principle as the HDD in that it serves as non-volatile storage for information. Most HDDs today come in the form of small rectangular boxes. The head moves to different sectors of the platter, depending on where the data to be transferred is.ĭata transfer is done in a random-access manner, which simply means that information can be stored or retrieved in any order. These platters are paired with a readwrite head, which is controlled by an actuator arm. It consists of spinning platters with a magnetic coating where data is stored or retrieved. HDD is the traditional non-volatile storage option, which means that the information is kept even if you turn your computer off. Before we go deeper into NVMe compatibility, it is important to understand the difference between HDD and SSD.
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