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2. Free list - Wikipedia

   en.wikipedia.org/wiki/Free_list

   Free lists make the allocation and deallocation operations very simple. To free a region, one would just link it to the free list. To allocate a region, one would simply remove a single region from the end of the free list and use it. If the regions are variable-sized, one may have to search for a region of large enough size, which can be ...

3. Block allocation map - Wikipedia

   en.wikipedia.org/wiki/Block_allocation_map

   In computer file systems, a block allocation map is a data structure used to track disk blocks that are considered "in use". Blocks may also be referred to as allocation units or clusters. [1] CP/M used a block allocation map in its directory. Each directory entry could list 8 or 16 blocks (depending on disk format) that were allocated to a file.

4. du (Unix) - Wikipedia

   en.wikipedia.org/wiki/Du_(Unix)

   By default, the Single UNIX Specification (SUS) specifies that du is to display the file space allocated to each file and directory contained in the current directory. Links will be displayed as the size of the link file, not what is being linked to; the size of the content of directories is displayed, as expected.

5. Trim (computing) - Wikipedia

   en.wikipedia.org/wiki/Trim_(computing)

   Regardless of operating system, the drive can detect when the computer writes all zeros to a block, and de-allocate (trim) that block instead of recording the block of zeros. If reading a de-allocated block always returns zeros, this shortcut is transparent to the user, except for faster writing (and reading) of all-zero blocks, in addition to ...

6. Free-space bitmap - Wikipedia

   en.wikipedia.org/wiki/Free-space_bitmap

   One approach is to split the bitmap into many chunks. A separate array then stores the number of free sectors in each chunk, so chunks with insufficient space can be easily skipped over, and the total amount of free space is easier to compute. Finding free space now entails searching the summary array first, then searching the associated bitmap ...

7. What does "free up disk space" mean — and how do you fix it?

   www.aol.com/lifestyle/does-free-disk-space-mean...

   Beyond that, here are four totally doable ways to free up disk space on your computer, so you can go back to business (and browsing and shopping and streaming) as usual. Try System Mechanic for 30 ...

8. Memory management (operating systems) - Wikipedia

   en.wikipedia.org/wiki/Memory_management...

   Paged allocation divides the computer's primary memory into fixed-size units called page frames, and the program's virtual address space into pages of the same size. The hardware memory management unit maps pages to frames. The physical memory can be allocated on a page basis while the address space appears contiguous.

9. df (Unix) - Wikipedia

   en.wikipedia.org/wiki/Df_(Unix)

   df (abbreviation for disk free) is a standard Unix command used to display the amount of available disk space for file systems on which the invoking user has appropriate read access. df is typically implemented using the statfs or statvfs system calls .