For disks with sectors of 4096 bytes, the formula is the same except the constants are accordingly 8 times smaller. Regarding sectors of 520 bytes, usable byte

For disks with sectors of 4096 bytes, the formula is the same except the constants are accordingly 8 times smaller. Regarding sectors of 520 bytes, usable bytes are still 512. Quote from the above referenced document: > HDDs formatted with T10 PI (Protection Information) have 8 bytes added to the end of each sector. However, the user usable sector size will remain at 512 bytes or 4096 bytes. The 8 bytes of PI will increase the overhead of the disk sector density similar to overhead of ECC bytes in a given sector.