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Enhanced Second-Chance Algorithm vs simpler clock algorithm

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In Ch. 9- Vitual memory management- Topic no- 9.4.5.3 (Enhanced Second-Chance Algorithm)- Last paragraph, it is written that

"The major difference between this algorithm (Enhanced Second-Chance Algorithm) and the simpler clock algorithm is that here we give preference to those pages that have been modified in order to reduce the number of I/O required."

Here simpler clock algorithm is Second-Chance Algorithm.
Does this mean that only in Enhanced Second-Chance Algorithm, while replacing a page from frame, modified (dirty) page is removed first whereas in other algorithm non-modified (non-dirty) page is removed first?

posted May 31, 2017 by anonymous

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