2U storage system 4

https://myhighperformancestoragesite.greyhavendaily.com/posts/why-your-data-center-needs-a-high-performance-storage-array

A 2U storage system is a compact server rack unit that holds multiple hard drives in a dense, efficient layout. It's commonly used in data centers for high-capacity data storage, like for backing up files or running a NAS. The height of 2 rack units (3.5 inches) allows for good cooling and easy cable management, making it a popular choice for balancing space and performance.