1.The size of the byte has historically been hardware dependent and no definitive standards exist that mandate the size. The de facto standard of eight bits is a convenient power of two permitting the values 0 through 255 for one byte. Many types of applications use variables representable in eight or fewer bits, and processor designers optimize for this common usage. The popularity of major commercial computing architectures have aided in the ubiquitous acceptance of the 8-bit size.
Byte - Wikipedia, the free encyclopedia
2.Computer file - Wikipedia, the free encyclopedia
---------- Post added at 10:41 ---------- Previous post was at 10:40 ----------
1.The size of the byte has historically been hardware dependent and no definitive standards exist that mandate the size. The de facto standard of eight bits is a convenient power of two permitting the values 0 through 255 for one byte. Many types of applications use variables representable in eight or fewer bits, and processor designers optimize for this common usage. The popularity of major commercial computing architectures have aided in the ubiquitous acceptance of the 8-bit size.
Byte - Wikipedia, the free encyclopedia
2.Computer file - Wikipedia, the free encyclopedia
---------- Post added at 10:42 ---------- Previous post was at 10:41 ----------
3.**broken link removed**
What does the question exactly mean? Modifying a single data bit, a data byte, a sector? Do you refer to the raw magnetic media or the disk drive unit (which incorporates RAM itself)?Why data cant be modify directly on the hard disk?
But if we speak theoretically - it's possible.
i cant understand you mean DMA or direct memory access is a link between RAM and hard disk?DMA is between RAM and peripheral (hard disk) in this case. It doesn't change anything to the problem.
Ohh!The term DMA already indicates, that memory (RAM) is involved in the data transfer. The typical DMA situation is transferring data between RAM and hard disk without direct involvement of the CPU.
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