The Hard Life of a Hard Drive How
- Slides: 42
The Hard Life of a Hard Drive How files grow, become fragmented, and are defragmented Adapted from the File: Fragmentation. Defragmentation. gif contained in Wikipedia’s English version of the article on Defragmentation (http: //en. wikipedia. org/wiki/Defragmentation) under the terms of the GNU Free Documentation License.
1 - A fresh start
2 – A new file – the red file
3 – A second new file – the blue file
4 – The red file is added to
5 – A new file – the green file
6 – A new file - the teal file
7 – The blue file is added to
8 – A new file – the orange file
9 – Five files
10 – The blue file is deleted
11 – A new file – blue #2
12 – The green file is added to! It’s going to be slow to read …
13 – Start defrag – make space for red
14 – Move one red block back
15 – Make more room for red
16 – Move one more red back
17 – Make more room for red
18 – Red is now contiguous
19 – Make more room
20 – Move in blue #2
21 – Blue #2 is now contiguous
22 – Start to defrag green
23 – Green …
24 – Green …
25 – Green …
26 – Green …
27 – Move teal to make more room
28 - … and move in green
29 – Make more room
30 - … and move more green
31 – Make more room
32 - … finish green
33 – Move on to teal
34 - … and put one teal in place
35 – Make more room
36 - … and move more teal
37 – Make more room
38 - … and move more teal
39 – Move more teal
40 – Almost done
41 – Finished defragmentation