Building a High-Performance, Reliable Storage Solution with LVM Cache and RAID 1

This article details how to build a fast and reliable storage solution using Linux Logical Volume Manager (LVM) caching for a RAID 1 array. The author faced a challenge needing massive storage where only a small portion of the data is frequently accessed, making traditional SSD+HDD setups inefficient. The article walks through creating an LVM cache volume, setting up RAID 1 on HDDs for redundancy, and compares alternative caching solutions like bcache and EnhanceIO. The author successfully implemented an SSD-cached RAID 1 HDD array, dramatically improving access speeds while ensuring data safety.