Block Device

Definitions

1. A storage device interface that reads and writes fixed-size blocks of data, such as a disk, SSD, or virtual volume. Block devices sit below filesystems and are important in operating systems, virtualization, and database performance tuning.

   In plain English: A storage device that reads and writes data in fixed-size blocks.

   Example: "The database ran on a fast block device with low latency because random I/O performance mattered more than raw sequential throughput."

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