Understanding the Standard HDD I/O unit size update and what it means for your workloads

As Azure continues to evolve to support modern workload patterns, we are refining how transactions are measured for Standard HDD Managed Disks . This update helps align billing more closely with actual I/O behavior while maintaining predictable cost controls for customers. In this post, we’ll walk through what’s changing, how transaction billing is calculated, and what this may mean for your workloads.