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mrmarkos@ayahuasca:~$ sudo e4defrag -c /dev/sda2
[sudo] password for mrmarkos: 
<Fragmented files>                             now/best       size/ext
1. /var/log/wtmp                                54/1              4 KB
2. /var/log/auth.log.1                          17/1              4 KB
3. /var/log/alternatives.log                     8/1              4 KB
4. /var/log/pm-powersave.log                    13/1              4 KB
5. /var/log/ConsoleKit/history                   6/1              4 KB

 Total/best extents                             88432/87912
 Average size per extent                        44 KB
 Fragmentation score                            0
 [0-30 no problem: 31-55 a little bit fragmented: 56- needs defrag]
 This device (/dev/sda2) does not need defragmentation.
 Done.

mrmarkos@ayahuasca:~$ sudo e4defrag -c /dev/sda1
<Fragmented files>                             now/best       size/ext
1. /boot/vmlinuz-3.2.0-29-generic                2/1           2371 KB
2. /boot/initrd.img-3.2.0-29-generic             1/1           2145 KB
3. /boot/abi-3.2.0-29-generic                    1/1            778 KB
4. /boot/config-3.2.0-29-generic                 1/1            144 KB
5. /boot/memtest86+.bin                          1/1            173 KB

 Total/best extents                             215/214
 Average size per extent                        55 KB
 Fragmentation score                            0
 [0-30 no problem: 31-55 a little bit fragmented: 56- needs defrag]
 This device (/dev/sda1) does not need defragmentation.
 Done.

$ sudo e4defrag -c /dev/sda3
Filesystem is not mounted

mrmarkos@ayahuasca:~$ sudo mount
[sudo] password for mrmarkos: 
/dev/sda2 on / type ext4 (rw,errors=remount-ro)
proc on /proc type proc (rw,noexec,nosuid,nodev)
sysfs on /sys type sysfs (rw,noexec,nosuid,nodev)
none on /sys/fs/fuse/connections type fusectl (rw)
none on /sys/kernel/debug type debugfs (rw)
none on /sys/kernel/security type securityfs (rw)
udev on /dev type devtmpfs (rw,mode=0755)
devpts on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=0620)
tmpfs on /run type tmpfs (rw,noexec,nosuid,size=10%,mode=0755)
none on /run/lock type tmpfs (rw,noexec,nosuid,nodev,size=5242880)
none on /run/shm type tmpfs (rw,nosuid,nodev)
/dev/sda1 on /boot type ext4 (rw)
/dev/sda4 on /home type ext4 (rw)

mrmarkos@ayahuasca:~$ sudo e4defrag -c /dev/sda4
<Fragmented files>                             now/best       size/ext
1. /home/mrmarkos/.kde/share/apps/rekonq/history
                                                 8/1              4 KB
2. /home/mrmarkos/.config/google-chrome/Default/Cookies-journal
                                                 4/1              4 KB
3. /home/mrmarkos/.config/google-chrome/Default/Network Action Predictor-journal
                                                 4/1              4 KB
4. /home/mrmarkos/.local/share/akonadi/db_data/mysql.err.old
                                                 4/1              4 KB
5. /home/mrmarkos/.config/google-chrome/Default/Shortcuts
                                                12/1              5 KB

 Total/best extents                             53662/52407
 Average size per extent                        104 KB
 Fragmentation score                            1
 [0-30 no problem: 31-55 a little bit fragmented: 56- needs defrag]                                                             
 This device (/dev/sda4) does not need defragmentation.                                                                         
 Done.