Device Mapper in Linux - LVM

In this video, we dive deep into the world of Linux storage management, focusing on the Device Mapper and its powerful role in managing disk storage with Logical Volume Manager (LVM) as our primary example.

One key aspect we cover is the distinction between Gigabytes (GB) and Gibibytes (GiB) - a crucial detail when working with storage sizes. LVM displays storage sizes in Gibibytes (GiB), not Gigabytes (GB), aligning with the binary system that computers inherently use. This difference is not just academic; it has practical implications for understanding the true capacity and allocation of your storage resources.

A Gibibyte (GiB) equals 230230 bytes or 1,073,741,824 bytes, compared to a Gigabyte (GB), which equals 109109 bytes or 1,000,000,000 bytes. This means that when LVM reports storage sizes, it’s providing a more precise measurement that reflects the actual binary-based usage of disk space, ensuring you have accurate data for managing and optimizing your storage solutions.

Stay tuned as we explore how Device Mapper facilitates the creation, mapping, and management of virtual disk devices, making LVM a powerful tool for flexible disk storage management. Whether you're a seasoned system administrator or just starting out, understanding these concepts is key to mastering Linux's storage capabilities ... https://www.youtube.com/watch?v=rmU-B21FM3M