Hitachi's disk business, formerly , was built on the acquisition of IBM's disk drive division and was later acquired by Western Digital in 2012. Tools like the GPT Disk Manager were vital during the transition period when drive capacities rapidly outpaced the standard 32-bit software environments of the time.
Assuming you have chosen a manager (e.g., EaseUS or MiniTool), here is the standard workflow to turn your Hitachi drive into a GPT disk: Hitachi Gpt Disk Manager Softwar
Hitachi GPT Disk Manager Software is a purpose-built, enterprise-grade tool for safe, efficient GPT disk administration—combining robust repair, alignment, migration, and automation features to keep large-scale storage environments healthy and consistent. Hitachi's disk business, formerly , was built on