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| n | Block-oriented |
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| u | user process can
process one block of data |
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| while next block
is read in |
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| u | swapping can
occur since input is taking place |
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| in system memory,
not user memory |
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| u | operating system
keeps track of assignment of |
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| system buffers to
user processes |
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| u | output is
accomplished by the user process |
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| writing a block
to the buffer and later actually |
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| written out |
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