• Common problems in wd hard disk due to firmware problems
• Booting process of hard disk, Connection types of hard disk with firmware toosl
• Types of hard disk and families , models, types architecture MDL DCM LBA
• Identify families from model no ,
• Types of hard disk pcb , pcb no , pcb families
• Matchng USB hard disk pcb with SATA hard disk pcb
• Basic idea of WD hard disk ROM firmware files, different extension
• Types of module, unique main micro moduels
• ROM Modules files (ROM FILES 0A, 0B/20B, 30, 47, 0D, 4F  )
• Analysis of ROM Module Data Structure
• Read, write , editing , regenerate of rom modules
• Backup of ROM modules in service area
• Structure of different rom module
• Viewing editning identify, read , copy rom modules, ROM files
• MAIN MODULES OF SERVICE AREA ( moduel 01, 11, 13, 5c, 10 1f , 02 , 35, 49 )
• LDR file loading on WD hard disk, Directory listing Module ,
• Key module for data backup old I series and new royl series
• Read,write, repair, editing modules of wd hard disk s
• Micro code firmware vertion, Wd fixing option

SPT value calculation, CASE study of WD hard disk firmware repair option