The most common reason. These are areas of the platter (HDD) or NAND flash (SSD) that are physically damaged and cannot hold data. Write Protection:
— few messages strike more fear into the heart of a data recovery enthusiast or system administrator. When you are using an HDD low level format tool (such as HDD LLF Low Level Format Tool, Victoria, or MHDD) and encounter this specific error, it signals more than a simple "can't format." It points to a precise physical or logical flaw on your hard drive. hdd low level format tool format error occurred at offset
The most common cause: the head cannot write reliably to that sector due to: The most common reason