1KB = 2(10)B = 1024B；
1MB = 2(10)KB = 1024KB = 2(20)B；
1GB = 2(10)MB = 1024MB = 2(30)B
1TB = 2(10)GB = 1024GB = 2(40)B
1PB = 2(10)TB = 1024TB = 2(50)B
1EB = 2(10)PB = 1024PB = 2(60)B
1ZB = 2(10)EB = 1024EB = 2(70)B
1YB = 2(10)ZB = 1024ZB = 2(80)B
这是操作系统计算方式
