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https://itrus.su/2017/10/03/%d0%b4%d0%b5%d1%84%d1%80%d0%b0%d0%b3%d0%bc%d0%b5%d0%bd%d1%82%d0%b0%d1%86%d0%b8%d1%8f-ext4/
Дефрагментация ext4