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2. Defragmentation - Wikipedia

   en.wikipedia.org/wiki/Defragmentation

   There is a utility, iDefrag, by Coriolis Systems available since OS X 10.3. On traditional Mac OS defragmentation can be done by Norton SpeedDisk and TechTool Pro. WAFL in NetApp's ONTAP 7.2 operating system has a command called reallocate that is designed to defragment large files. XFS provides an online defragmentation utility called xfs_fsr.

3. Comparison of S.M.A.R.T. tools - Wikipedia

   en.wikipedia.org/wiki/Comparison_of_S.M.A.R.T._tools

   Name Operating system License User interface Fixed drives USB, eSATA and removable drives RAID support [a] Shows S.M.A.R.T. attributes Hard drive self-testing Notification

4. Why is my computer so slow? - AOL

   www.aol.com/products/blog/why-is-my-computer-so-slow

   Upgrade to an SSD: Replace your ... Defragment Hard Drive (if applicable): If you're using a traditional hard drive ... (Mac) to see what is currently running and how much CPU, memory and disk ...

5. Contig (defragmentation utility) - Wikipedia

   en.wikipedia.org/wiki/Contig_(defragmentation...

   Unlike the Windows built-in defragmenter tool, Contig can defragment individual files, individual directories, and subsets of the file system using wildcards. Contig does not move any data except that belonging to the file in the question, so the amount it can defragment a file is limited to the largest contiguous block of free space on a system.

6. File system fragmentation - Wikipedia

   en.wikipedia.org/wiki/File_system_fragmentation

   [b] The file system could defragment the disk immediately after a deletion, but doing so would incur a severe performance penalty at unpredictable times. Now, a new file called F, which requires seven blocks of space, can be placed into the first seven blocks of the newly freed space formerly holding the file B, and the three blocks following ...

7. Trim (computing) - Wikipedia

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

   The TRIM command enables an operating system to notify the SSD of pages which no longer contain valid data. For a file deletion operation, the operating system will mark the file's sectors as free for new data, then send a TRIM command to the SSD. After trimming, the SSD will not preserve any contents of the block when writing new data to a ...

8. Fragmentation (computing) - Wikipedia

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

   In main memory fragmentation, when a computer program requests blocks of memory from the computer system, the blocks are allocated in chunks. When the computer program is finished with a chunk, it can free it back to the system, making it available to later be allocated again to another or the same program.

9. UltimateDefrag - Wikipedia

   en.wikipedia.org/wiki/UltimateDefrag

   Along with defragmentation, UltimateDefrag performs consolidation of both disk space and files within folders, arrangement of files by volatility (most often used files) or recency (most recently used files), and analysis of the disk. In addition, UltimateDefrag has the ability to defragment files based on manually entered wildcard expressions. [4]