LVM, or Logical Volume Management, is a technology that allows for the flexible management of storage devices on Linux systems. It provides a way to abstract and manage physical storage resources, like hard drives and SSDs, more dynamically and efficiently compared to traditional methods.

In traditional partitioning, you allocate fixed portions of your storage devices for specific purposes, which can lead to inefficient use of space and make resizing or managing partitions challenging. LVM addresses these limitations by introducing the concepts of physical volumes (PVs), volume groups (VGs), and logical volumes (LVs).

1. Physical Volume (PV): A physical storage device such as a hard drive or SSD. LVM allows you to create physical volumes and manage them independently.

2. Volume Group (VG): A collection of physical volumes that act as a pool of storage space. You can add multiple PVs to a VG, and the combined storage capacity becomes available for allocation.

3. Logical Volume (LV): A virtual block device created within a volume group. LVs can be sized and resized dynamically, allowing for efficient utilization of available space. They are used as if they were physical partitions.

Now, let's consider scenarios:

Scenario 1: Flexibility and Resize Suppose you have a system with LVM configured. If you need to increase the storage available to a certain application, you can easily extend the logical volume by allocating more space from the volume group, without needing to repartition the entire drive.

Scenario 2: Snapshot and Backup LVM allow you to take snapshots of logical volumes, creating read-only copies of the data at a specific point in time. This is useful for backups, testing, or recovery purposes without interrupting regular usage.

Scenario 3: Combine Multiple Drives Imagine you have several smaller hard drives. With LVM, you can create a volume group that spans these drives, effectively creating a larger storage pool that can be allocated as needed across different logical volumes.

Other LVM-like Technologies:

1. ZFS (Zettabyte File System): An advanced file system with built-in volume management. It offers features like data integrity, snapshots, and RAID-like capabilities.

2. Btrfs (B-tree file system): Another file system with features like snapshots, subvolumes, and data checksumming, which allow for flexible storage management.

3. Storage Spaces: A feature in Windows that provides similar capabilities to LVM, allowing users to combine physical drives into storage pools and create resizable virtual volumes.

In summary, LVM offers dynamic and efficient storage management through its PV, VG, and LV concepts. It's particularly beneficial when dealing with changing storage needs, efficient space utilization, and creating resilient storage setups. Other technologies like ZFS, Btrfs, and Storage Spaces also provide similar capabilities in different ecosystems.