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All traditional attempts to recover a lost file have been exhausted, what is the last place you would examine?
RAM
Swap File
File System
Page File
The Swap File should be examined if all other means of recovering a file have been depleted. See information regarding Page VS Swap file: Swapping involves the moving of a process's entire collection data in memory to a range of space on the backing store, often to a swapfile or swap partition. The process goes from being in memory to swapped out entirely; there is no in-between. Obviously the process will need to be entirely idle for swapping to be at all worthwhile. The advantage of this is that it is relatively simple to grasp and memory for a program is always allocated contiguously, the downside is that performance on a machine can become absolutely abysmal when the system ends up in a state where things are constantly swapping. The algorithm also involves the repeated swapping in and out of data that will not be used in the foreseeable future.
Paging attempts to solve these problem, by taking physical memory, and carving it up into things called "frames" of some fixed size. It also takes the memory space of each running process, and carves it up into pages (which are the same size as frames); this is called the physical address space, due to the need to use physical addresses to access each block of memory.
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