The unit in which data is stored and retrieved on a fixed block architecture disk.
固定块结构磁盘中,数据存储和检索的基本单位。
If it is, you will exclusive OR the last byte of the 8-byte parity-fixed block with 0xf0 (11110000).
如果是的话,就要用0xf0(11110000)与奇偶修正过的8字节块进行exclusive OR。
If the pointer was set in a fixed block, the variable to which it points may no longer be fixed.
如果将指针设置在固定的块中,它所指向的变量可能不再是固定的。
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